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The killdeer lays a clutch of four to six eggs that are buff to beige, with brown markings and black speckles. The eggs are about 38 by 27 mm (1.5 by 1.1 in) in size, [ 7 ] and laid at intervals of 24 to 48 hours. [ 3 ]
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.
In whichever form they are laid, the eggs of most ovuliparous species contain a substantial quantity of yolk to support the growth and activity of the embryo after fertilization, and sometimes for some time after hatching as well. [1] Among the vertebrates, ovuliparity is common among fishes and most amphibians.
Charadridae lay two to four eggs into the nest, which is usually a shallow scrape in the open ground, and incubate the clutch for 21–30 days. [3] In species where both parents incubate the eggs, females and males vary in the way they share their incubation duties, both within and between species.
Just one fly can lay up to 300 eggs at a time and is drawn "to the odor of a wound or natural opening on a live, warm-blooded animal." ... "These eggs hatch into dangerous parasitic larvae, and ...
Precocial birds can provide protein-rich eggs and thus their young hatch in the fledgling stage – able to protect themselves from predators and the females have less post-natal involvement. Altricial birds are less able to contribute nutrients in the pre-natal stage; their eggs are smaller and their young are still in need of much attention ...
The eggs should not be eaten and should be thrown away or returned to Costco for a full refund. Consumers with any questions can call 888-877-7221 Sunday-Saturday, 8 a.m. to 5 p.m. ET.
Eggs that crack during the cooking process, such as hard-boiling, "are safe," noted the USDA. These cracked eggs do not need to be thrown away. Also, "remember that all eggs should be thoroughly ...