Ornithology Lecture notes 1 - Introduction to Birds Gary Ritchison
Coursera: Theropoda Dinosaurs and the Origin of Birds - University of Alberta
Tree of Life web project
Main Groups of Modern Birds Mikko's Phylogeny Archive
Bird Tree global phylogeny of birds (Jetz et al. 2012, The global diversity of birds in space and time, Nature 491: 444-448. )
resultados na árvore OneZoom
Tetrapod Zoology Darren Naish
The Theropod Database Mickey Mortimer