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Beware: Male Mallards in eclipse plumage (as well as other molts/odd plumages) can get easily mistaken for this hybrid.
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https://macaulaylibrary.org/asset/117973281
https://macaulaylibrary.org/asset/321649671
https://macaulaylibrary.org/asset/192549321
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Other names: Blallard
NOTE: Pure American Black Ducks frequently show a slight green iridescence on part of their head (like this bird). Hybrids tend to show a significant amount of green. The presence of just a small amount does not necessarily indicate Mallard involvement.
Pure American Black Ducks often show a thin white border to the posterior edge of the speculum (like this bird). The presence of white in this area does not necessarily indicate Mallard involvement. Hybrids tend to show a more extensive white posterior border to the speculum. Hybrids also tend to show a white anterior border to the speculum.
Female pure Mallards frequently show an olive-colored bill (like this bird). Greenish bill coloration on the bill does not necessarily indicate American Black Duck involvement.
Pure American Black Ducks don’t tend to show truly white tail feathers, however edges of worn feathers can appear lighter than normal.
Beware: Male Mallards in eclipse plumage (as well as other molts/odd plumages) can get easily mistaken for this hybrid.
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https://macaulaylibrary.org/asset/47595271
https://macaulaylibrary.org/asset/47595131
https://macaulaylibrary.org/asset/36015121
https://macaulaylibrary.org/asset/286454621
https://macaulaylibrary.org/asset/312359841
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Other names: Muddled Duck
Beware: Male Mallards in eclipse plumage (as well as other molts/odd plumages) can get easily mistaken for this hybrid.
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https://macaulaylibrary.org/asset/304056281
https://macaulaylibrary.org/asset/306740551
https://macaulaylibrary.org/asset/133528871
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https://macaulaylibrary.org/asset/141627021
https://macaulaylibrary.org/asset/277738581 - domestic MALL x NOPI
https://macaulaylibrary.org/asset/375883091
https://macaulaylibrary.org/asset/45165951
https://macaulaylibrary.org/asset/46803461
https://macaulaylibrary.org/asset/45919501
https://www.inaturalist.org/observations/105072702 - likely backcrossed with MALL
https://www.inaturalist.org/observations/101484571 - domestic MALL x NOPI
https://www.inaturalist.org/observations/104540727 - domestic MALL x NOPI
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https://macaulaylibrary.org/asset/631481207
https://macaulaylibrary.org/asset/339440271
https://www.inaturalist.org/observations/158091352 - domestic MALL x GWTE
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https://macaulaylibrary.org/asset/159499551
https://macaulaylibrary.org/asset/286669051
https://macaulaylibrary.org/asset/286669041
https://www.inaturalist.org/observations/59639989 - male. female is pure Brown Teal
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See also White-cheeked Pintail x Yellow-billed Teal
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https://www.inaturalist.org/observations/67530487
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See also White-cheeked x Yellow-billed Pintail
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