Monday, April 14, 2008

Happy "Hatch" Day

We checked on the four Killdeer eggs yesterday, all was well!

And today:








The adult birds incubate the eggs for 24 to 26 days before they are ready to hatch (our took 25 days). A chick takes 18 to 36 hours to break out of the shell, and the parents will removed every piece from the vicinity of the nest within shorty after hatching.

When the young are first hatched, they are completely covered in thick down and resemble their parents, except that they have only one band, not two, across the chest. At first this down is wet, but it dries within an hour or so, and the young birds look like fluffy balls with rather long legs. Unlike the young of songbirds, shorebird young leave the nest as soon as their down has dried, they are able to feed themselves within a day, running about quickly, jabbing at the ground for small insects. The downy plumage is lost rapidly as they grow, and by midsummer they are almost indistinguishable from adults. However, head patterns are less distinct, and all browns are paler.

The adults do not have to feed the young. However, they do watch them constantly and do a thorough job of brooding, guarding against enemies, and warning of danger. At the first sign of danger, the parent will give an alarm note that alerts the chicks to freeze. The young will squat motionless until the parent gives an all-clear signal. Soft calls will bring the chicks running to nestle under the parent's warm feathers for a short nap or for the night. For the first few days, the chicks are brooded often to protect them from the sun or from the cold and wet. The parents cease to brood them at all after about 24 days and after 40 days the young birds are ready to fly.

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