Publications

Books and book chapters

3. Zink, R.M. and G. Voelker.  2018.  Evolutionary and ecological perspectives on avian distributions.  In Ornithology: foundation, analysis, and application.  Morrison, M.L., A.D. Rodewald, G. Voelker, M.R. Colon, and J.F. Prather (eds.). Johns Hopkins University Press.

2. A.D. Rodewald, Morrison, M.L., M.R. Colon, G. Voelker, and J.F. Prather.  2018.  What makes a bird?  In Ornithology: foundation, analysis, and application.  Morrison, M.L., A.D. Rodewald, G. Voelker, M.R. Colon, and J.F. Prather (eds.). Johns Hopkins University Press.

1. Morrison, M.L., A.D. Rodewald, G. Voelker, M.R. Colon, and J.F. Prather (eds.).  2018. Ornithology: foundation, analysis, and application.  Johns Hopkins University Press.

Journal Articles (* denotes graduate student; † denotes undergraduate student)

109. Voelker, G., M. Ortega, M. Sanchez, K.D. Keith, E.A. Koblik, A.V. Bushuev, A.B. Kerimov, N.V. Linh and S.V. Drovetski. 2025. High endemism of Haemosporidian lineages in a southern Vietnam avian community. Diversity (Special Issue on Bird Parasites, Vol. 3) 17: 568. https://doi.org/10.3390/d17080568

108. Wells, K., J.A. Bell, A. Fecchio, S.V. Drovetski, V. Ellis, S. Galen, S. Hackett, H. Lutz, H.R. Skeen, G. Voelker, W. Wamiti, J. Weckstein and N.J. Clark. 2025. Parasite abundance-occupancy relationships across biogeographic regions: joint effects of niche breadth, host availability and climate. Journal of Biogeography 52:55-65. https://doi.org/10.1111/jbi.15015 

107. Voelker, G., G.O.U. Wogan, J.W. Huntley*, P.M. Kaliba, D. H. de Swardt and R.C.K. Bowie. 2025. Climate-cycling did not affect haplotype distribution in an abundant Southern African avian habitat generalist species, the Familiar Chat (Oenanthe familiaris). Integrative Zoology 20:595-607. https://doi.org/10.1111/1749-4877.12879

106. Wogan, G.O.U., G. Voelker, T. Jain, P.M. Kaliba, and R.C.K. Bowie. 2024. Niche Dynamics Modulate Population Connectivity Between Disjunct Ranges of the Cape Robin-Chat (Cossypha caffra) Supporting An Aridlands Species Pump. Frontiers of Biogeography 17:e132679. https://doi.org/10.21425/fob.17.132679

105. Martinez, V.*, K.D. Keith*, J.K. Grace and G. Voelker. 2023. Avian haemosporidians of the breeding birds in the Davis Mountains sky-islands of west Texas, USA. Parasitology, 150:1266-1276. https://doi.org/10.1017/S0031182023001087

104. Nachman, M.W., and 117 co-authors including G. Voelker. 2023. Specimen collection is essential for modern science. PLoS Biol 21(11): e3002318.

https://doi.org/10.1371/journal.pbio.3002318

103. Brooks, D.M., H.L. Prestridge, G. Voelker, and K.A. Arnold. 2022 (published 2023). Specimen records of Sooty Shearwater (Ardenna grisea) from the Gulf of Mexico, with comments on temporal frequency. Bull. Texas Ornithological Soc. 55:136-139.

102. Ilahaine, L., R. Colominas-Ciurò, P. Bize, G. Boano, M. Cucco, M. Ferri, G. Masoero, C.M. Meier, M. Pavia, G. Ramello, G. Voelker, I. Pellegrino. 2023. Molecular investigation on infection by haemosporidians in three Western Palearctic species of swift (Apodidae) and their ectoparasitic louse flies. Parasitology Research.

https://doi.org/10.1007/s00436-023-07874-8

101. Palacios, M.*, A.A. González-Díaz, L.A. Rodriguez, M. Mateos, R. Rodiles-Hernandez, M. Tobler and G. Voelker.  2023.  Population level genetic divergence and phylogenetic placement of Mexican shortfin mollies (Mollienesia, Poecilia, Poeciliidae).  Neotropical Ichthyology 21:e220101. https://doi.org/10.1590/1982-0224-2022-0101

100. Palacios, M.*, L. Arias-Rodriguez, M. Arciniega, V. Rodriguez, E. Barraza, N. Herrera, D.C. Marroquín Mora, J.B. Ulloa Rojas, G.M. Couturier, G. Voelker and M. Tobler.  2023.  Conservation genetics of the tropical gar (Atractosteus tropicus, Lepisosteidae).  Conservation Genetics. https://doi.org/10.1007/s10592-023-01509-2 

99.  Nasuelli, M., L. Ilahiane, G. Boano, M. Cucco, A. Galimberti, M. Pavia, E. Pioltelli, A. Shafaeipour, G. Voelker, and I. Pellegrino.  2022.  Phylogeography of Lanius senator in its breeding range: conflicts between alpha taxonomy, subspecies distribution and genetics.  The European Zoological Journal 89:941-957.

98.  Keith, K.D.*, J.P. Pistone*, T.A. Campbell and G. Voelker.  2022.  Avian Haemosporidian Diversity in south Texas: new lineages and variation in prevalence between sampling sources and sites.  Diversity 14, 378. https://doi.org/10.3390/d14050378.

97.  Voelker, G., G.O.U. Wogan, J.W. Huntley, and R.C.K. Bowie. 2021. Comparative phylogeography of southern African bird species suggests an ephemeral speciation model. Diversity 13(9), 434. https://doi.org/10.3390/d13090434

96.  Pistone, J.P.*, J.E. Light, T.A. Campbell, T. A. Catanach and G. Voelker.  2021.  Restricted geographic sampling yields low parasitism rates but surprisingly diverse host associations in avian lice (Insecta: Phthiraptera) from South Texas.  Diversity 13:430. https://doi.org/10.3390/d13090430.

95.  Fecchio, A., N.J. Clark, J.A. Bell, H. Skeen, H.L. Lutz, G.M. De La Torre, J.A. Vaughan, V.V. Tkach, F. Schunck, F.C. Ferreira, É.M. Braga, C. Lugarini, W. Wamiti, J.H. Dispoto, S.C. Galen, K. Kirchgatter, M. C. Sagario, V.R. Cueto, D. González-Acuña, M. Inumaru, Y. Sato, Y.R. Schumm, P. Quillfeldt, I. Pellegrino, G. Dharmarajan, P. Gupta, V.V. Robin, A. Çiloğlu, A. Yildirim, X. Huang, L. Chapa-Vargas, P. Álvarez Mendizábal, D. Santiago-Alarcon, S.V. Drovetski, G. Voelker, R. Ricklefs, S. Hackett, M.D. Collins, J.D. Weckstein, and K. Wells.  2021.  Global drivers of avian haemosporidian infections vary across zoogeographical regions. Global Ecology and Biogeography 30:2393-2406.

94.  M. Pavia, S.V. Drovetski, G. Boano, K.W. Conway, I. Pellegrino, and G. Voelker.  2021.  Elevation of two subspecies of the Dunnock (Prunella modularis) to species rank.  Bulletin of the British Ornithologists’ Club 141:199-210. 

93.  Ilahiane, L., G. Boano, M. Pavia, I. Pellegrino, M. Grussu, G. Voelker and A. Galimberti.  2021. Completing the genetic puzzle of the reed warbler complex (A. scirpaceus complex): insights from Italy.  Bird Study, DOI: 10.1080/00063657.2021.1927980. 

92.  Voelker, G., J.W. Huntley*, J. Bryja, C. Denys, R. Šumbera, T.C. Demos, L. Lavrenchenko, V. Nicolas, T.P. Gnoske and J.C. Kerbis Peterhans.  2021.  Molecular systematics and biogeographic history of the African climbing-mouse complex (Dendromus).  Molecular Phylogenetics and Evolution 161:1-15.  https://doi.org/10.1016/j.ympev.2021.107166. 

91.  Pellegrino, I., L. Ilahiane, G. Boano, M. Cucco, M. Pavia, H.L. Prestridge and G. Voelker.  2021.  Avian Haemosporidian Diversity on Sardinia: A First General Assessment for the Insular Mediterranean.  Diversity 13: 75. https://doi.org/10.3390/d13020075.

90.  Clark, N.J., S.V. Drovetski and G. Voelker.  2020.  Robust geographical determinants of infection prevalence and a contrasting latitudinal diversity gradient for haemosporidian parasites in Western Palearctic birds.  Molecular Ecology 29:3131-3143 .

89.  Conway, K.W., C.D. King, A.P. Summers, D.-M. Kim, P.A. Hastings, G.I. Moore, S.P. Iglésias, M.V. Erdmann, G. Short, K. Fujiwara, T. Trnski, G. Voelker and L. Rüber.  2020.  Molecular Phylogenetics of the Clingfishes (Teleostei: Gobiesocidae) – Implications for Classification.  Copeia 108:886-906.

88.  Vaughn, J.C.*, G. Voelker and J.J. Heatley.  2020.  Glucose concentrations in closely related Titmice (Paridae: Baeolophus) species linked to regional habitat differences within a suspected avian hybrid zone.  The Open Ornithology Journal 13:10-23.

87.  Ham-Dueñas, J.G., R. Canales del Castillo, G. Voelker, I. Ruvalcaba-Ortega, C. Aguirre-Calderón, and J.I. Gonzalez-Rojas.  2020.  Adaptive genetic diversity and evidence of population genetic structure in the endangered Sierra Madre Sparrow (Xenospiza baileyi).  PLoS One 15:e0232282. https://doi.org/10.1371/journal.pone.0232282.

86.  Wogan, G., G. Voelker, G. Oatley and R.C.K. Bowie.  2020.  Biome stability predicts population structure of a southern African aridland bird species.  Ecology and Evolution 10:4066-4081. 

85.  Hibbitts, T.J., W.A. Ryberg, J.A. Harvey, G. Voelker, A.M. Lawing, C.S. Adams, D.B. Neuharth, D.E. Dittmer, C.M. Duran, B.D. Wolaver, J.P. Pierre, B.J. Labay and T.J. Laduc.  2019.  Phylogenetic structure of Holbrookia lacerata (Cope 1880)(Squamata: Phrynosomatidae): one species or two?  Zootaxa 4619:139-154. 

84.  Colón, M.R., M.R. Hutchinson, A.M. Long, G. Voelker, and M.L. Morrison.  2019.  Post-breeding habitat use by Golden-cheeked Warblers (Setophaga chrysoparia).  Western North American Naturalist 79:337-346.

83.  Castellanos, A.A., J.W. Huntley, G. Voelker and A.M. Lawing.  2019.  Environmental filtering improves ecological niche models across multiple scales.  Methods in Ecology and Evolution 10:481-492.

82.  Raković, Marko, J. Neto M., R. Lopes, M. Collinson, E. Koblik, I. Fadeev, Y. Lohman, S. Aghayan, G.  Boano, M. Pavia, Y. Perlman, Y. Kiat, A. Ben Dov, G. Voelker, and S.V. Drovetski.  2019.  Geographic patterns of mtDNA and Z-linked sequence variation in the Common Chiffchaff and the ‘chiffchaff complex’. PLoS ONE 14:e0210268. https://doi.org/10.1371/journal.pone.0210268.

81.  Huntley, J.W.*, K.D. Keith*, A.A. Castellanos*, L.J. Musher and G. Voelker.  2019.  Underestimated and cryptic diversification patterns across Afro-tropical lowland forests.  Journal of Biogeography 46:381-391.

80.  Takano, O.M.*, G. Voelker, D.R. Gustafsson, J.E. Light.  2019.  Molecular phylogeny and novel host associations of avian chewing lice (Insecta: Phthiraptera) from South Africa.  Systematic Entomology 44:289-304.

79.  Harvey, J.A.*, and G. Voelker. 2019.  Host associations and climate influence avian haemosporidian distributions in Benin.  International Journal of Parasitology 49:27-36.

78.  Drovetski, S.V., I.V. Fadeev, M. Raković, R.J. Lopes, G. Boano, M. Pavia, E.A. Koblik, Y.V. Lohman, Y.A. Red’kin, S.A. Aghayan, S. Reis, S.S. Drovetskaya, and G. Voelker.  2018.  A test of the European Pleistocene Refugial Paradigm, using a Western Palearctic endemic bird species.  Proceedings of the Royal Society of London B 285: 2018.1606.  DOI: 10.1098/rspb.2018.1606.

77.  Drovetski, S.V., A.B. Reeves, Y.A. Red'kin, I.V. Fadeev, E.A. Koblik, V.N. Sotnikov, and G. Voelker.  2018.  Multi-locus reassessment of a striking discord between mtDNA gene trees and taxonomy across two congeneric species complexes.  Molecular Phylogenetics and Evolution 120:43-52.

76.  Huntley, J.W., J.A. Harvey, M. Pavia, G. Boano, and G. Voelker.  2018.  The systematics and biogeography of the Bearded Greenbuls (Aves: Criniger) reveals the impact of Plio-Pleistocene forest fragmentation on Afro-tropical avian diversity.  Zool. J. Linnean Society 183:672-686.

75.  Harvey, J.A.*, and G. Voelker.  2017.  Avian Haemosporidian detection across source materials: prevalence and genetic diversity.  Parasitology Research 116:3361-3371.

74.  Pellegrino, I., M. Cucco, J.A. Harvey, F. Liberatore, M. Pavia, G. Voelker, and G. Boano.  2017.  So similar and yet so different: taxonomic status of Pallid swift Apus pallidus and Common swift Apus apus.  Bird Study 64:344-352.

73.  Pistone, J.*, J.J. Heatley, T.A. Campbell, and G. Voelker.  2017.  Assessing Passeriformes health in South Texas via select venous analytes.  Comparative Biochemistry and Physiology, Part B 210:64-71.

72.  Huntley, J.W.* and G. Voelker.   2017.  A tale of the nearly tail-less:  the effects of Plio-Pleistocene climate change on the diversification of the African avian genus Sylvietta.  Zoologica Scripta 46:523-535.

71.  Takano, O.M.*, P.S. Mitchell†, D.R. Gustafsson, A. Adite, G. Voelker, and J.E. Light.  2017. An assessment of host associations, geographic distributions, and genetic diversity of avian chewing lice (Insecta: Phthiraptera) from Benin.  Journal of Parasitology 103:152-160.

70.  Outlaw, D.C., J.A.Harvey*, S.V. Drovetski and G. Voelker.  2017. Diversity and distribution of avian haemosporidians in Sub-Saharan Africa: An inter-regional biogeographic overview. Parasitology 144:394-402.

69.  Voelker, G., M. Tobler, H.L. Prestridge, E. Duijm, D. Groenenberg, M.R. Hutchinson*, A.D. Martin†, A. Nieman, C.S. Roselaar, and J.W. Huntley*.  2017.  Three new species of Stiphrornis (Aves: Muscicapidae) from the Afro-tropics, with a molecular phylogenetic assessment of the genus.  Systematics and Biodiversity 15:87-104.

68.  Prestridge, H.L., and G. Voelker.  2016.  First vouchered specimen of Slate-throated Redstart (Myioborus miniatus) for Texas with notes on other recent Brewster County specimens.  Bulletin of the Texas Ornithological Society 49:83-86.

67.  Palacios, M.*, G. Voelker, L.A. Rodriguez, M. Mateos and M. Tobler.  2016.  Phylogenetic analyses of the subgenus Mollienesia (Poecilia, Poeciliidae, Teleostei) reveal taxonomic inconsistencies, cryptic biodiversity, and spatio-temporal aspects of diversification in Middle America.  Molecular Phylogenetics and Evolution 103:230-244.

66.  Voelker, G., R.C.K. Bowie and K.W. Conway.  2016. Replacement names for Chapinia Voelker & Bowie, 2016 and Ripleyia Voelker & Bowie, 2016 (Aves: Passeriformes: Muscicapidae).  Zootaxa 4107:599.

65.  Huntley, J.W.* and G. Voelker.  2016.  Cryptic diversity in Afro-tropical forests: the systematics and biogeography of the avian genus Bleda.  Molecular Phylogenetics and Evolution 99:297-308.

64.  Wogan, G.O.U., K.A. Feldheim, A.S.Tsai, A.A. Brown, J.Kapelke, M. Galinato, J.N.Tung, J.M. Bates, P. Kaliba, G. Voelker and R.C.K. Bowie.  2016.  New genetic resources and a preliminary multi-locus assessment of species boundaries in the Batis capensis species complex (Passeriformes: Platysteridae).  Biochemical Systematics and Ecology 65:83-88.  

63.  Light, J.E., C. Nessner, D. Gustafsson, S. Wise and G. Voelker.  2016.  Remarkable levels of avian louse (Insecta: Phthiraptera) diversity in the Congo Basin.  Zoologica Scripta 45:538-551. 

62.  Voelker, G., J.W. Huntley*, J.V. Penalba and R.C.K. Bowie.  In press.  Resolving taxonomic uncertainty and historical biogeographic patterns in Muscicapa flycatchers and their allies.  Molecular Phylogenetics and Evolution.

61.  Gold, J.R., S.C. Willis, M.A. Renshaw, A. Buentello, C.M. Hollenbeck, H.J. Walker, Jr., and G. Voelker.  In press.  Phylogenetic relationships of tropical eastern Pacific snappers (Lutjanidae) inferred from mitochondrial DNA sequences.  Systematics and Biodiversity.

60.  Ryberg, W., J.A. Harvey*, A. Blick†, T. Hibbitts, and G. Voelker. In press.  Genetic structure inconsistent with subspecies designations in the Western Massasauga (Sistrurus tergeminus).  Journal of Fish and Wildlife Management.

59.  Hibbitts, T.J., S.A. Wahlberg, and G. Voelker.  2015.  Resolving the identity of Texas Desmognathus. Southeastern Naturalist 14:223-220.

58.  Bates, J.M., and G. Voelker.  2015.  Scientific collecting in Malawi, a response to Dowsett-Lemaire et al.  Bird Conservation International 25:270-279.

57.  Voelker, G., G. Semenov, I.V. Fadeev, A. Blick†, and S.V. Drovetski.  2015.  The biogeographic history of Phoenicurus redstarts reveals an allopatric mode of speciation and an out-of-Himalayas colonization pattern. Systematics and Biodiversity 13:296-305.

56.  Heatley, J.J., J. Cary*, L. Kingsley, H. Beaufrere, K.E. Russell, G. Voelker.  2015.  Midazolam sedates Passeriformes for field sampling but affects multiple venous blood analytes. Veterinary Medicine: Research and Reports 6:61-69.

55.  Wogan, G.O.U., K.A. Feldheim, G. Voelker, and R.C.K. Bowie.  2015.  Microsatellite markers for the Cape Robin Chat (Cossypha caffra) and the Red-Capped Robin Chat (Cossypha natalensis) for use in demographic and landscape genetics analyses.  Conservation Genetics Resources 7:151-154.

54.  Wogan, G.O.U., K.A. Feldheim, G. Voelker, and R.C.K. Bowie.  2015.  Development and characterization of thirteen microsatellite markers for the Fiscal Flycatcher (Sigelus silens) for use in phylogeographic and landscape genetics research.  Conservation Genetics Resources 7:125-127.

53.  Slager, D.L, C.J. Battey, R.W. Bryson, Jr., G. Voelker, and J. Klicka.  2014. A multilocus phylogeny of a major New World avian radiation: The Vireonidae. Molecular Phylogenetics and Evolution 80:95-104.

52.  Drovetski, S.V., S.A. Aghayan, V. Mata, N.A. Mode, R.J. Lopes, J. Harvey*, G. Voelker.  2014.  Does the niche-breadth or trade-off hypothesis explain the abundance-occupancy relationship in avian haemosporidia?  Molecular Ecology 23:3322-3329.

51.   Voelker, G., J.V. Penalba, J.W. Huntley* and R.C.K. Bowie.  2014.  Diversification in an Afro-Asian songbird clade reveals founder-event speciation via trans-oceanic dispersals and a southern to northern colonization pattern in Africa.  Molecular Phylogenetics and Evolution 73:97-105.

50.   Palacios, M.*, L. Arias-Rodriguez, M. Plath, C. Eifert, H. Lerp, A. Lamboj, G. Voelker and M. Tobler.  2013.  The Rediscovery of a Long Described Species Reveals Additional Complexity in Speciation Patterns of Poeciliid Fishes in Sulfide Springs. PLoS ONE 8(8): e71069. doi:10.1371/journal.pone.0071069

49.   Oatley, G., K.A. Feldheim, G. Voelker, and R.C.K. Bowie.  2013.  Development of twelve tetranucleotide microsatellite loci for White-eyes (Zosterops spp.) for use in phylogeographic and hybridization studies.  Conservation Genetics Resources 5:977-979.

48.   Heatley, J.J., J. Cary*, K. Russell, and G. Voelker.  2013. Clinicopathologic analysis of passeriform venous blood reflects transitions in elevation and habitat.  Veterinary Medicine: Research and Reports 4: 21-29.

47.   Drovetski, S.V., G. Semenov, S.S. Drovetskaya, I.V. Fadeev, Y.A. Red’kin, and G. Voelker.  2013. Geographic mode of speciation in a mountain specialist avian family endemic to the Palearctic.  Ecology and Evolution 3:1518-1528.

46.   Voelker, G., R.C.K. Bowie, and J. Klicka.  2013.  Gene trees, species trees and Earth history combine to shed light on the evolution of migration in a model avian system.  Molecular Ecology 22:3333-3344.

45.  Voelker, G., B. D. Marks, C. Kahindo, U. A’genonga, F. Bapeamoni, L. E. Duffie†, J. W. Huntley*, E. Mulotwa, S. A. Rosenbaum† and J. E. Light.  2013.  River barriers and cryptic biodiversity in an evolutionary museum.  Ecology and Evolution 3:536-545. DOI: 10.1002/ece3.482.

44.  Oatley, G., G. Voelker, T.M. Crowe, and R.C.K. Bowie.  2012.  A multi-locus phylogeny reveals a complex pattern of diversification related to climate and habitat heterogeneity in southern African white-eyes.  Mol. Phylogenet. Evol. 64:633-644.

43.  Voelker, G., R.C.K. Bowie, B. Wilson, and C. Anderson.  2012.  Phylogenetic relationships and speciation patterns in an African savanna dwelling bird genus (Myrmecocichla).  Biol. J. Linnean Society 106:180-190.

42.  Voelker, G., and J. E. Light.  2011.  Palaeoclimatic events, dispersal and migratory losses along the Afro-European axis as drivers of biogeographic distribution in Sylvia warblers.  BMC Evol. Biol. 11:163.

41.  Gold, J. R., G. Voelker, and M.A. Renshaw.  2011.  Phylogenetic relationships of tropical western Atlantic snappers in Subfamily Lutjaninae (Lutjanidae; Perciformes) inferred from mitochondrial DNA sequences.  Biol. J. Linnean Society 102:915-929.

40.  Glen, R., R.C.K. Bowie, S. Stolberger and G. Voelker.  2011.  Geographically structured plumage variation among populations of White-headed Black Chat (Myrmecocichla arnotti) in Tanzania confirms the race collaris to be a valid taxon.  J. Ornithology 152:63-70.

39.  Melo, M., R.C.K. Bowie, G. Voelker, M. Dallimer, N.J. Collar and P.J. Jones.  2010. Multiple lines of evidence support the recognition of a very rare bird species – the Príncipe thrush.  J. Zoology 282:120-129.

38.  Lim, H.-C., F. Zou, S. S. Taylor, B. D. Marks, R. G. Moyle, G. Voelker and F. H. Sheldon.  2010.  Phylogeny of Magpie-Robins and Shamas (Aves: Turdidae: Copsychus and Trichixos): Implications for Island Biogeography in Southeast Asia.  J. of Biogeography 37:1894-1906.

37. Voelker, G.  2010.  Repeated vicariance of Eurasian songbird lineages since the late Miocene.  J. of Biogeography 37:1251-1261.

36. Voelker, G., R.K. Outlaw*, S. Reddy, M. Tobler, J.M. Bates, S.J. Hackett, C. Kahindo, B.D. Marks, J.C. Kerbis Peterhans and T.P. Gnoske.  2010.  A new species of boubou from the Albertine Rift (Malaconotidae: Laniarius).  Auk 127:678-689.

35. Outlaw, R.K.*, G. Voelker, and R.C.K. Bowie.  2010.  Shall we chat? Evolutionary relationships in the genus Cercomela (Muscicapidae) and its relation to Oenanthe reveals extensive polyphyly among chats distributed in Africa, India and the Palearctic.  Mol. Phylogenet. Evol. 55:284-292.

34. Voelker, G., R.K. Outlaw* and R.C.K. Bowie.  2010.  Pliocene forest dynamics as a primary driver of African bird speciation.  Global Ecol. Biogeogr. 19:111–121.

33. Voelker, G., M. Melo, and R.C.K. Bowie.  2009.  A Gulf of Guinea island endemic is a member of a Mediterranean-centered bird genus.  Ibis 151:580-583.

32. Voelker, G., S. Rohwer, D. C. Outlaw* and R. C. K. Bowie.  2009.  Repeated trans-Atlantic dispersal catalyzed a global songbird radiation.  Global Ecol. Biogeogr. 18:41-49.

31. Voelker, G., and R. K. Outlaw*.  2008.  Establishing a perimeter position: thrush speciation around the Indian Ocean Basin. J. Evol. Biol. 21:1779-1788.

30. Voelker, G., and J. Klicka.  2008.  Systematics of Zoothera thrushes, and a synthesis of True Thrush molecular systematic relationships.  Mol. Phylogenet. Evol. 49:377-381.

29. Outlaw, D. C.*, and G. Voelker.  2008.  Pliocene climatic change in insular Southeast Asia as an engine of diversification in Ficedula flycatchers.  J. of Biogeography 35:739-752.

28. Voelker, G., S. Rohwer, R. C. K. Bowie and D. C. Outlaw*.  2007.  Molecular systematics of a speciose, cosmopolitan songbird genus: Defining the limits of, and relationships among, the Turdus thrushes.  Mol. Phylogenet. Evol. 42:422-434.

27. Bridge, E. S., G. Voelker, C. W. Thompson, A. W. Jones, and A. J. Baker.  2007.  Effects of size and migratory behavior on the evolution of wing molt in terns (Sterninae): A phylogenetic-comparative study.  Auk 124:841-856.

26. Rohwer, S., A. G. Navarro, and G. Voelker.  2007.  Rates versus counts: Fall molts of Lucy’s Warblers Vermivora luciae.  Auk 124: 806-814.

25. Outlaw, R. K.†, G. Voelker, and D. C. Outlaw*.  2007.  Molecular systematics and historical biogeography of the Rock-Thrushes (Muscicapidae: Monticola).  Auk 124: 561-577.

24. Outlaw, D. C.*, and G. Voelker.  2006.  Systematics of Ficedula flycatchers (Muscicapidae): a molecular reassessment of a taxonomic enigma.  Mol. Phylogenet. Evol. 41:118-126.

23. Outlaw, D. C.*, and G. Voelker.  2006.  Phylogenetic tests of hypotheses for the evolution of avian migration: a case study using the Motacillidae. Auk 123:455-466.

22. Fuchs, J., J. Fjeldså, R. C. K. Bowie, G. Voelker, and E. Pasquet.  2006.  The African warbler genus Hyliota as a lost lineage in the Oscine songbird tree: evidence from mitochondrial and nuclear sequence data.  Mol. Phylogenet. Evol. 39:186-197.

21. Bowie, R. C. K., G. Voelker, J. Fjelsdå, L. Lens, S. J. Hackett, and T. M. Crowe.  2005.  Systematics of the Olive Thrush Turdus olivaceus species complex with reference to the taxonomic status of the endangered Taita Thrush T. helleri.  J. Avian Biol. 36:391-404.

20. Klicka, J., G. Voelker, and G. M. Spellman*.  2005.  A molecular phylogenetic analysis of “true thrushes” (Aves: Turdinae).  Mol. Phylogenet. Evol. 34:486-500.

19. Voelker, G.  2004.  Can migrants do it faster?  Accelerated molt of Baird’s Sparrow and further insights into southwestern molting grounds.  Condor 106:910-914.

18. Bates, J. M., R. C. K. Bowie, D. E. Willard, G. Voelker, and C. Kahindo. 2004.  A need for continued collecting of avian voucher specimens in Africa: Why blood is not enough.  Ostrich 75:187-191.

17. Voelker, G., and G. M. Spellman*.  2004.  Nuclear and mitochondrial DNA evidence of polyphyly in the avian superfamily Muscicapoidea.  Mol. Phylogenet. Evol. 30:386-394.

16. Outlaw D. C.*, G. Voelker, B. Mila, and D. J. Girman.  2003.  The evolution of migration in, and historical biogeography of the Catharus thrushes: A molecular phylogenetic approach.  Auk 120: 299-310.

15. Voelker, G.  2002.  Systematics and historical biogeography of wagtails (Aves: Motacilla): Dispersal versus vicariance revisited.  Condor 104:725-739.

14. Voelker, G.  2002.  Molecular phylogenetics and the historical biogeography of dippers (Cinclus).  Ibis 104:577-584.

13. Voelker, G., and S. L. McFarland†.  2002.  Molt patterns and molting grounds of Lucy’s and Virginia’s Warblers: similar yet different.  Wilson Bulletin 114:255-263.

12. Liversidge, R, and G. Voelker.  2002.  The Kimberley Pipit: A new African species.  Bull. British Ornithologists’ Club 122:93-109.

11. Voelker, G.  2001.  Morphological correlates of migratory distance and flight display in the avian genus Anthus.  Biol. J. Linnean Soc. 73:425-435.

10. Voelker, G.  2000.  Molt of the Gray Vireo.  Condor 102:610-618.

9. Voelker, G.  1999.  Body mass and moult data for South African Motacillids, with body mass data for 47 additional South African bird species.  Ostrich (J. of African Ornithology) 70:233-235.

8. Voelker, G.  1999.  Dispersal, vicariance and clocks: Historical biogeography and speciation in a cosmopolitan passerine genus (Anthus: Motacillidae).  Evolution 53:1536-1552.

7. Voelker, G.  1999.  Molecular evolutionary relationships in the avian genus Anthus (Pipits: Motacillidae). Mol. Phylogenet. Evol.  11:84-94.

6. Voelker, G., and S. V. Edwards.  1998.  Can weighting improve bushy trees?  Models of cytochrome b evolution and the molecular systematics of pipits and wagtails (Aves: Motacillidae).  Systematic Biology 47:589-603.

5. Voelker, G., and S. Rohwer.  1998.  Contrasts in the scheduling of molt and migration in eastern and western Warbling-Vireos.  Auk 115:142-155.

4. Voelker, G.  1997.  The molt cycle of the Arctic Tern, with comments on aging criteria.  J. of Field Ornithology 68:400-412.

3. Voelker, G.  1996.  An hypothesis for seasonal color change in the genus Sterna.  J. Avian Biol. 27:257-259.

2. Winker, K., J. T. Klicka, and G. Voelker.  1996.  Sexual size dimorphism in birds from southern Veracruz, Mexico.  II.  Thryothorus maculipectus and Henicorhina [Leucosticta] prostheleuca.  J. of Field Ornithology 67:236-251.

1. Winker, K., G. Voelker, and J. T. Klicka.  1994.  A morphometric examination of sexual dimorphism in the Hylophilus, Xenops, and an Automolus from Southern Veracruz, Mexico.  J. of Field Ornithology 65:307-323.

Articles in edited volumes

 14.  Voelker, G.  2005.  Yellow-breasted Pipit Anthus chloris.  Pp. 1100-1101 in Hockey, P. A. R., W. R. J. Dean, and P. G. Ryan (eds), Roberts—Birds of Southern Africa, VIIth ed.  The Trustees of the John Voelcker Bird Book Fund, Cape Town.  

13.  Voelker, G.  2005.  Striped Pipit Anthus lineiventris.  Pp. 1101-1102 in Hockey, P. A. R., W. R. J. Dean, and P. G. Ryan (eds), Roberts—Birds of Southern Africa, VIIth ed.  The Trustees of the John Voelcker Bird Book Fund, Cape Town.

12.  Voelker, G.  2005.  African Rock Pipit Anthus crenatus.  Pp. 1102-1103 in Hockey, P. A. R., W. R. J. Dean, and P. G. Ryan (eds), Roberts—Birds of Southern Africa, VIIth ed.  The Trustees of the John Voelcker Bird Book Fund, Cape Town.

11.  Voelker, G.  2005.  African Pipit Anthus cinnamomeus.  Pp. 1103-1104 in Hockey, P. A. R., W. R. J. Dean, and P. G. Ryan (eds), Roberts—Birds of Southern Africa, VIIth ed.  The Trustees of the John Voelcker Bird Book Fund, Cape Town.

10.  Voelker, G.  2005.  Mountain Pipit Anthus hoeschi.  Pp. 1105 in Hockey, P. A. R., W. R. J. Dean, and P. G. Ryan (eds), Roberts—Birds of Southern Africa, VIIth ed.  The Trustees of the John Voelcker Bird Book Fund, Cape Town.

9.  Voelker, G.  2005.  Plain-backed Pipit Anthus leucophrys.  Pp. 1105-1106 in Hockey, P. A. R., W. R. J. Dean, and P. G. Ryan (eds), Roberts—Birds of Southern Africa, VIIth ed.  The Trustees of the John Voelcker Bird Book Fund, Cape Town.

8.  Voelker, G.  2005.  Buffy Pipit Anthus vaalensis.  Pp. 1107-1108 in Hockey, P. A. R., W. R. J. Dean, and P. G. Ryan (eds), Roberts—Birds of Southern Africa, VIIth ed.  The Trustees of the John Voelcker Bird Book Fund, Cape Town.

7.  Voelker, G., and R. Liversidge  2005.  Long-tailed Pipit Anthus longicaudatus.  Pp. 1108 in Hockey, P. A. R., W. R. J. Dean, and P. G. Ryan (eds), Roberts—Birds of Southern Africa, VIIth ed.  The Trustees of the John Voelcker Bird Book Fund, Cape Town.

6.  Voelker, G.  2005.  Long-billed Pipit Anthus similis.  Pp. 1108-1109 in Hockey, P. A. R., W. R. J. Dean, and P. G. Ryan (eds), Roberts—Birds of Southern Africa, VIIth ed.  The Trustees of the John Voelcker Bird Book Fund, Cape Town.

5.  Voelker, G., and R. Liversidge.  2005.  Kimberley Pipit Anthus pseudosimilis.  Pp. 1110 in Hockey, P. A. R., W. R. J. Dean, and P. G. Ryan (eds), Roberts—Birds of Southern Africa, VIIth ed.  The Trustees of the John Voelcker Bird Book Fund, Cape Town.

4.  Voelker, G.  2005.  Wood Pipit Anthus nyassae.  Pp. 1110-1111 in Hockey, P. A. R., W. R. J. Dean, and P. G. Ryan (eds), Roberts—Birds of Southern Africa, VIIth ed.  The Trustees of the John Voelcker Bird Book Fund, Cape Town.

3.  Voelker, G.  2005.  Short-tailed Pipit Anthus brachyurus.  Pp. 1111-1112 in Hockey, P. A. R., W. R. J. Dean, and P. G. Ryan (eds), Roberts—Birds of Southern Africa, VIIth ed.  The Trustees of the John Voelcker Bird Book Fund, Cape Town.

2.  Voelker, G.  2005.  Bushveld Pipit Anthus caffer.  Pp. 1112-1113 in Hockey, P. A. R., W. R. J. Dean, and P. G. Ryan (eds), Roberts—Birds of Southern Africa, VIIth ed.  The Trustees of the John Voelcker Bird Book Fund, Cape Town.

1.  Voelker, G.  2005.  Tree Pipit Anthus trivialis.  Pp. 1113-1114 in Hockey, P. A. R., W. R. J. Dean, and P. G. Ryan (eds), Roberts—Birds of Southern Africa, VIIth ed.  The Trustees of the John Voelcker Bird Book Fund, Cape Town.