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The northern cardinal (Cardinalis cardinalis), known colloquially as the common cardinal, red cardinal, or just cardinal, is a bird in the genus Cardinalis.It can be found in southeastern Canada, through the eastern United States from Maine to Minnesota to Texas, New Mexico, southern Arizona, southern California and south through Mexico, Belize, and Guatemala.
The number of eggs laid in a single brood is referred to as the clutch. Clutch size is usually within a small range of variation. Some birds respond to the accidental loss of eggs by laying a replacement egg. Others will stop laying based on the apparent size of the clutch.
Females generally arrive several days to a week later. Nest building and egg laying both occur usually in less than two weeks after the adults arrive. The clutch is usually four eggs, occasionally from three to five and exceptionally from one to six eggs may be laid. The eggs are a light blue color, often with a slight greenish or whitish tinge.
Use a hopper-style feeder with a long perch to accommodate the larger size of a mature cardinal. Platform feeders work well but if using a tube feeder you must be sure the perch is sturdy enough ...
A northern cardinal nest showing the nest structure and key features of their egg in Cardinalidae. Nearly all cardinalids are monogamous breeders and are highly territorial. Despite being monogamous this is only during the breeding season, and each year the birds might partner up with a different bird.
The egg-viability hypothesis states that high temperatures favour small clutches because of a reduction in egg viability. [18] This explains the reason why when Red-winged Blackbirds – which are open nesters - lay large eggs at low latitudes, female birds initiate clutch incubation before the clutch completion. [ 18 ]
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