Search results
Results from the WOW.Com Content Network
These eggs are incubated by the female, [14] usually after the second-to-last egg is laid, [54] for 11 to 20 days, [53] although most hatch after 14 to 15 days. About 88% of nests produce at least one nestling, but this can be lowered by poor weather and a younger breeding female. [14] The eggs generally hatch in the order they were laid.
Eastern bluebirds measure 16–21 cm (6.3–8.3 in) long, span 25–32 cm (9.8–12.6 in) across the wings, and weigh 27–34 g (0.95–1.20 oz). [12] [11] Male bluebirds have a bright head, back, and wings. Their breast is a brownish red. [12] Females are lighter with gray on the head and back and some blue on their wings and tail.
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.
That way all of the eggs will hatch on the same day and the young will all grow and develop on the same schedule so that they all fledge at the same time. Some bluebirds will have eggs in early ...
For premium support please call: 800-290-4726 more ways to reach us
Still, predators like raccoons and house sparrows do plenty of damage to first nestings of bluebirds. A male eastern bluebird clings to the opening of the pair's chosen nest box.
The American robin is the state bird of Wisconsin. This list of birds of Wisconsin includes species documented in the U.S. state of Wisconsin and accepted by the Records Committee of the Wisconsin Society for Ornithology (WSORC). As of July 2022 there were 441 species and a species pair included in the official list. Of them, 96 are classed as accidental, 34 are classed as casual, 53 are ...
Similar in construction to the blue jay's nest, it tends to be a bit larger (25 to 43 cm (9.8 to 16.9 in)), using a number of natural materials or scavenged trash, often mixed with mud. Between two and six eggs are laid during breeding season. The eggs are oval in shape with a somewhat glossy surface.