Auriculars or ear coverts vary greatly among bird species.
![Abert's Towhee](https://hollandwest.com/wp-content/uploads/2017/10/ABTO-JV8A0089-c.jpg)
Abert’s Towhee
Acorn Woodpecker
American Robin
![American Robin](https://hollandwest.com/wp-content/uploads/2017/10/AMRO-JV8A0513-c.jpg)
American Robin
Barn Swallow auriculars not differentiated.
![Barn Swallow](https://hollandwest.com/wp-content/uploads/2017/10/BARS-DSC_0162-c.jpg)
Barn Swallow
Bronzed Cowbird
![Bronzed Cowbird juvenile](https://hollandwest.com/wp-content/uploads/2017/10/BROC-JV8A0058-c.jpg)
Bronzed Cowbird juvenile
Bridled Titmouse
![Bridled Titmouse](https://hollandwest.com/wp-content/uploads/2017/10/BRTI-JV8A0621-c.jpg)
Bridled Titmouse
Cactus Wren
![Cactus Wren](https://hollandwest.com/wp-content/uploads/2017/10/CACW-JV8A0070-c.jpg)
Cactus Wren
Cattle Egret
![Cattle Egret](https://hollandwest.com/wp-content/uploads/2017/10/CAEG-JV8A1431-c.jpg)
Cattle Egret
Canyon Towhee
![Canyon Towhee](https://hollandwest.com/wp-content/uploads/2017/10/CANT-JV8A0525-c.jpg)
Canyon Towhee
Curve-billed Thrasher
![Curve-billed Thrasher](https://hollandwest.com/wp-content/uploads/2017/10/CBTH-JV8A0204-c.jpg)
Curve-billed Thrasher
Chicken, auriculars
![Chicken](https://hollandwest.com/wp-content/uploads/2017/10/CHIC-JV8A0459-c.jpg)
Chicken
Eastern Meadowlark
![Eastern Meadowlark](https://hollandwest.com/wp-content/uploads/2017/10/EAME-JV8A0064-c.jpg)
Eastern Meadowlark
EMU
![EMU](https://hollandwest.com/wp-content/uploads/2017/10/EMUU-JV8A0129-c.jpg)
EMU
Fish Crow
![Fish Crow](https://hollandwest.com/wp-content/uploads/2017/10/FICR-JV8A0640-c.jpg)
Fish Crow
Gambel’s Quail male
![Gambel's Quail](https://hollandwest.com/wp-content/uploads/2017/10/GAQU-JV8A0198-GAQU.jpg)
Gambel’s Quail
Gambel’s Quail female
![Gambel's Quail](https://hollandwest.com/wp-content/uploads/2017/10/GAQU-JV8A0208-c.jpg)
Gambel’s Quail
Great Blue Heron
![Great Blue Heron](https://hollandwest.com/wp-content/uploads/2017/10/GBHE-JV8A0880-c.jpg)
Great Blue Heron
Gilded Flicker female
![Gilded Flicker](https://hollandwest.com/wp-content/uploads/2017/10/GIFL-JV8A0012-c.jpg)
Gilded Flicker
Gilded Flicker
![Gilded Flicker](https://hollandwest.com/wp-content/uploads/2017/10/GILF-JV8A0424-c.jpg)
Gilded Flicker
Gila Woodpecker female
![Gila Woodpecker female](https://hollandwest.com/wp-content/uploads/2017/10/GIWO-DSC_0044-c.jpg)
Gila Woodpecker female
Great Egret
![Great Egret](https://hollandwest.com/wp-content/uploads/2017/10/GREG-JV8A0034-c.jpg)
Great Egret
Greater Roadrunner
![Greater Roadrunner](https://hollandwest.com/wp-content/uploads/2017/10/GRRO-JV8A0992-c.jpg)
Greater Roadrunner
Great-tailed Grackle
![Great-tailed Grackle](https://hollandwest.com/wp-content/uploads/2017/10/GTGR-JV8A0039-c.jpg)
Great-tailed Grackle
Great-tailed Grackle female
![Great-tailed Grackle female](https://hollandwest.com/wp-content/uploads/2017/10/GTGR-JV8A0052-c.jpg)
Great-tailed Grackle female
Helmeted Guineafowl
![Helmeted Guineafowl](https://hollandwest.com/wp-content/uploads/2017/10/HEGU-JV8A0497-c.jpg)
Helmeted Guineafowl
Hepatic Tanager
![Hepatic Tanager](https://hollandwest.com/wp-content/uploads/2017/10/HETA-JV8A0852-c.jpg)
Hepatic Tanager
House Finch
![House Finch](https://hollandwest.com/wp-content/uploads/2017/10/HOFI-JV8A0364-c.jpg)
House Finch
Hepatic Tanager
![Hepatic Tanager](https://hollandwest.com/wp-content/uploads/2017/10/HOSP-JV8A0265-c.jpg)
Hepatic Tanager
Inca Dove
![Inca Dove](https://hollandwest.com/wp-content/uploads/2017/10/INDO-JV8A0250-c.jpg)
Inca Dove
Killdeer
![Killdeer](https://hollandwest.com/wp-content/uploads/2017/10/KILL-JV8A0262-c.jpg)
Killdeer
Laughing Gull
![Laughing Gull](https://hollandwest.com/wp-content/uploads/2017/10/LAGU-DSC_0433-c.jpg)
Laughing Gull
Little Blue Heron
![Little Blue Heron](https://hollandwest.com/wp-content/uploads/2017/10/LBHE-JV8A1013-c.jpg)
Little Blue Heron
Lesser Scaup
![Lesser Scaup](https://hollandwest.com/wp-content/uploads/2017/10/LESC-JV8A0037-c.jpg)
Lesser Scaup
Limpkin
![Limpkin](https://hollandwest.com/wp-content/uploads/2017/10/LIMP-JV8A1028-c.jpg)
Limpkin
Lincoln’s Sparrow
![Lincoln's Sparrow](https://hollandwest.com/wp-content/uploads/2017/10/LISP-JV8A0446-c.jpg)
Lincoln’s Sparrow
Mexican Jay
![Mexican Jay](https://hollandwest.com/wp-content/uploads/2017/10/MEJA-JV8A0232-c.jpg)
Mexican Jay
Mourning Dove
![Mourning Dove](https://hollandwest.com/wp-content/uploads/2017/10/MODO-JV8A0227-c.jpg)
Mourning Dove
Mute Swan
![Mute Swan](https://hollandwest.com/wp-content/uploads/2017/10/MUSW-JV8A0768-c.jpg)
Mute Swan
Northern Cardinal
![Northern Cardinal](https://hollandwest.com/wp-content/uploads/2017/10/NOCA-JV8A1140-c.jpg)
Northern Cardinal
Northern Mockingbird
![Northern Mockingbird](https://hollandwest.com/wp-content/uploads/2017/10/NOMO-JV8A0093-c.jpg)
Northern Mockingbird
Olive Sparrow
![Olive Sparrow](https://hollandwest.com/wp-content/uploads/2017/10/OLSP-JV8A1291-c.jpg)
Olive Sparrow
Pied-billed Grebe
![Pied-billed Grebe](https://hollandwest.com/wp-content/uploads/2017/10/PBGR-JV8A0367-c.jpg)
Pied-billed Grebe
Phainopepla
![Phainopepla](https://hollandwest.com/wp-content/uploads/2017/10/PHAI-JV8A0530-c.jpg)
Phainopepla
Pileated Woodpecker
![Pileated Woodpecker](https://hollandwest.com/wp-content/uploads/2017/10/PIWO-JV8A0813-c.jpg)
Pileated Woodpecker
Plain Chachalaca
![Plain Chachalaca](https://hollandwest.com/wp-content/uploads/2017/10/PLCH-JV8A1150-c.jpg)
Plain Chachalaca
Rosy-faced Lovebird
![Rosy-faced Lovebird](https://hollandwest.com/wp-content/uploads/2017/10/RFLO-JV8A0564-c.jpg)
Rosy-faced Lovebird
Roseate Spoonbill
![Roseate Spoonbill](https://hollandwest.com/wp-content/uploads/2017/10/ROSP-DSC_0376-c.jpg)
Roseate Spoonbill
Royal Tern
![Royal Tern](https://hollandwest.com/wp-content/uploads/2017/10/ROYT-DSC_0608-c.jpg)
Royal Tern
Red-winged Blackbird female
![Red-winged Blackbird female](https://hollandwest.com/wp-content/uploads/2017/10/RWBL-JV8A0368-c.jpg)
Red-winged Blackbird female
Sandhill Crane
![Sandhill Crane](https://hollandwest.com/wp-content/uploads/2017/10/SACR-JV8A2022-c.jpg)
Sandhill Crane
Sage Thrasher
![Sage Thrasher](https://hollandwest.com/wp-content/uploads/2017/10/SATH-JV8A0325-c.jpg)
Sage Thrasher
Scaled Quail
![Scaled Quail](https://hollandwest.com/wp-content/uploads/2017/10/SCQU-JV8A1082-c.jpg)
Scaled Quail
Snowy Egret
![Snowy Egret](https://hollandwest.com/wp-content/uploads/2017/10/SNEG-DSC_0870-c.jpg)
Snowy Egret
Western Gull
![Western Gull](https://hollandwest.com/wp-content/uploads/2017/10/WEGU-2009081812-c.jpg)
Western Gull
Western Meadowlark
![Western Meadowlark](https://hollandwest.com/wp-content/uploads/2017/10/WEME-JV8A0229-c.jpg)
Western Meadowlark
White-faced Ibis
![White-faced Ibis](https://hollandwest.com/wp-content/uploads/2017/10/WFIB-JV8A1118-c.jpg)
White-faced Ibis
White Ibis
![White Ibis](https://hollandwest.com/wp-content/uploads/2017/10/WHIB-JV8A0154-c.jpg)
White Ibis
Wild Turkey
![Wild Turkey](https://hollandwest.com/wp-content/uploads/2017/10/WITU-DSC_0239-c.jpg)
Wild Turkey
Wood Stork
![Wood Stork](https://hollandwest.com/wp-content/uploads/2017/10/WOST-JV8A0894-c.jpg)
Wood Stork
Wood Stork juvenile
![Wood Stork juvenile](https://hollandwest.com/wp-content/uploads/2017/10/WOST-JV8A0944-c.jpg)
Wood Stork juvenile
White-winged Dove
![White-winged Dove](https://hollandwest.com/wp-content/uploads/2017/10/WWDO-JV8A0300-c.jpg)
White-winged Dove
Yellow-crowned Night-Heron
![Yellow-crowned Night-Heron](https://hollandwest.com/wp-content/uploads/2017/10/YCNH-JV8A1450-c.jpg)
Yellow-crowned Night-Heron
Auriclulars