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Table 2.3 (Continued)
Development and
Species Feet (Tarsus/toes) Weight (g) Integument Beak / Mouth Vocalizations Other
VULTURES (Cathartidae): Anisodactyl toe arrangement. Altricial young.
Turkey Vulture Gray at first Hatch: 60 Down: long, white and Beak: dark, short, Lacks syrinx but able Eyes: may be open
(Cathartes aura) (washed with feces), fluffy, shorter on head. hooked, with large to make sounds. at hatch, iris gray.
then pinkish. Adult: 2006 Face, throat, and crop areas nares that are Hatchling hisses Leave nest:
Ref: 7 (bna.339) black and bare. Down perforate. weakly at first, then approximately 60 d
thickens and turns “dingy variations of hissing after hatching with
white” by 25 d. Traces of sounds when short flights at first,
down left at 60 d. Head disturbed. extended flight at
turns red by first spring. 70–80 d.
HAWKS, EAGLES, KITES (Accipitridae): Anisodactyl toe arrangement, raptorial feet. Altricial or semi‐altricial young.
White‐tailed Yellow. Hatch: 17.4 Down: 1st coat is vinaceous Black, hooked. Gape: Unknown. When Iris: brown (red in
Kite (Elanus buff on upper, buffy white red. threatened gape and adult).
leucurus) Adult: 346 on chin and sides, lighter raise wings but make Leave nest: 1st
on lower back sides. 2nd no sound. flight ~ 4–5 wk.
Refs: 1, 7 down (d 7), gray or bluish‐ post‐hatch.
(bna.178) gray and longer. Fully
feathered 40 d. Juvenile
plumage retained at least
4 months.
Golden Eagle Pale pink colored at Hatch: 100 Down: 1st down short, Black, hooked, Hatchling: chirp. Eyes: partly open at
(Aquila hatch, then yellow. white or with pale gray. 2nd raptorial, with Nestling calls usually hatch but cannot
chrysaetos) Feathered to toes. Adult: F: 4627, (d 6) long, thicker, white prominent egg tooth. for food begging: see well. Feed
M: 3900 down. Cere: yellowish chirps, cheeps, selves 40 d (food
Refs: 1, 7 white in nestling. chitters. 15 d: tsik. brought by
(bna.684) 25 d: seeir, then loud parents). Fly:
pssa or tsycuk tsycuk. 63–70 d.
0004509154.INDD 36 06-01-2020 06:34:54