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LAIMĪGU JAUNO 2022. GADU, ĒRGĻU ĢIMENE!
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The Whys, Whens and Hows of Copulation (Mating) ➡ https://imgur.com/a/sYYcHoB
When bald eagles mate (Copulate)
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Eagles can mate (Copulate) year around. The male and female briefly press their cloacae, called a Cloacal Kiss, to transfer sperm to the female. Most copulations happen away from the nesting site. Copulation does not mean egg laying, even though the female tends to solicit copulations more often when she is close to egg laying.
In this region, Jackie lays eggs between January and March.
It is believed that sperm can be stored in the oviduct for about 2 weeks. If successful, copulation may be enough to fertilize the whole clutch of 2-4 eggs. It takes about 2 days for an egg to be laid after ovulation. Bald eagle eggs are laid 3-5 days apart.
During the egg laying season, the female goes through a few periods of fertility which are about a month apart. Period of fertility lasts about 2 weeks. That allows them to lay replacement clutches, if all eggs are lost early on.
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Both Jackie and Shadow develop a Brood Patch: a patch of featherless skin low on the abdomen. Brood patch is supplied with blood vessels aiding in heat transfer➡ https://imgur.com/a/Xm2ODsj
Brood Patch Examples - Barn Owl, Unknown Eagle and Jackie and Shadow - Click on images to enlarge
https://imgur.com/5BfFXaz
Barn owl and Unknown Bald eagle clearly showing their brood patches
Photo Credits Barn Owl - Mel and Sydney Blog / Unknown Eagle - Holly Smith
https://imgur.com/kGoKJ6y
Jackie and Shadow - Note the difficulty in visualizing their brood patches on the nest.