Auriculars or ear coverts vary greatly among bird species.

Abert’s Towhee
Acorn Woodpecker
American Robin

American Robin
Barn Swallow auriculars not differentiated.

Barn Swallow
Bronzed Cowbird

Bronzed Cowbird juvenile
Bridled Titmouse

Bridled Titmouse
Cactus Wren

Cactus Wren
Cattle Egret

Cattle Egret
Canyon Towhee

Canyon Towhee
Curve-billed Thrasher

Curve-billed Thrasher
Chicken, auriculars

Chicken
Eastern Meadowlark

Eastern Meadowlark
EMU

EMU
Fish Crow

Fish Crow
Gambel’s Quail male

Gambel’s Quail
Gambel’s Quail female

Gambel’s Quail
Great Blue Heron

Great Blue Heron
Gilded Flicker female

Gilded Flicker
Gilded Flicker

Gilded Flicker
Gila Woodpecker female

Gila Woodpecker female
Great Egret

Great Egret
Greater Roadrunner

Greater Roadrunner
Great-tailed Grackle

Great-tailed Grackle
Great-tailed Grackle female

Great-tailed Grackle female
Helmeted Guineafowl

Helmeted Guineafowl
Hepatic Tanager

Hepatic Tanager
House Finch

House Finch
Hepatic Tanager

Hepatic Tanager
Inca Dove

Inca Dove
Killdeer

Killdeer
Laughing Gull

Laughing Gull
Little Blue Heron

Little Blue Heron
Lesser Scaup

Lesser Scaup
Limpkin

Limpkin
Lincoln’s Sparrow

Lincoln’s Sparrow
Mexican Jay

Mexican Jay
Mourning Dove

Mourning Dove
Mute Swan

Mute Swan
Northern Cardinal

Northern Cardinal
Northern Mockingbird

Northern Mockingbird
Olive Sparrow

Olive Sparrow
Pied-billed Grebe

Pied-billed Grebe
Phainopepla

Phainopepla
Pileated Woodpecker

Pileated Woodpecker
Plain Chachalaca

Plain Chachalaca
Rosy-faced Lovebird

Rosy-faced Lovebird
Roseate Spoonbill

Roseate Spoonbill
Royal Tern

Royal Tern
Red-winged Blackbird female

Red-winged Blackbird female
Sandhill Crane

Sandhill Crane
Sage Thrasher

Sage Thrasher
Scaled Quail

Scaled Quail
Snowy Egret

Snowy Egret
Western Gull

Western Gull
Western Meadowlark

Western Meadowlark
White-faced Ibis

White-faced Ibis
White Ibis

White Ibis
Wild Turkey

Wild Turkey
Wood Stork

Wood Stork
Wood Stork juvenile

Wood Stork juvenile
White-winged Dove

White-winged Dove
Yellow-crowned Night-Heron

Yellow-crowned Night-Heron
Auriclulars