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Each female lays three to seven light-blue or, rarely, white eggs. The female incubates the eggs, which hatch after 13 to 16 days. The young cannot care for themselves upon hatching. The female broods the chicks for up to seven days after hatching. Fledglings then leave the nest 15 to 20 days after hatching. [11]
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The only living mammals that lay eggs are echidnas and platypuses. In the latter, the eggs develop in utero for about 28 days, with only about 10 days of external incubation (in contrast to a chicken egg, which spends about one day in tract and 21 days externally). [11] After laying her eggs, the female curls around them.
It builds an open cup nest in the branches of a tree; both sexes participate. The clutch may be two to seven eggs, which are blueish or light brown with darker brown spots. Young are altricial, and are brooded by the female for 8–12 days after hatching. They may stay with their parents for one to two months. The name jay derives from the bird ...
The species is one of the first North American birds to lay eggs, and normally has two to three broods per breeding season, which lasts from April to July. [16] The nest is most commonly located 1.5–4.5 m (4.9–14.8 ft) above the ground in a dense bush or in a fork between two tree branches, and is built by the female alone.
With climate change spurring earlier springs across much of North America, many birds are laying their eggs earlier in the year, according to a new study – adding to mounting evidence that ...
An audio recording of a house sparrow. The house sparrow (Passer domesticus) is a bird of the sparrow family Passeridae, found in most parts of the world. It is a small bird that has a typical length of 16 cm (6.3 in) and a mass of 24–39.5 g (0.85–1.39 oz).
Bald eagle Jackie laid her first egg shortly before 5 p.m. Jan. 25 at a nest near Big Bear Lake in California. It’s the first egg of the nesting season.