Tag Archives: Incubation

Your questions, answered: cold, egg cups, incubation, and nestflix!

02/27/19: DM2 brings in a stick

We have videos below, but we wanted to answer some of your questions first! Why is Mom off her eggs? Is DM2 really helping her? It’s cold – why aren’t they continuously incubating? Is the egg cup big enough? On eggs and incubation: We don’t have any guarantee that all of the eggs will hatch, but embryos can suspend fairly easily and with no damage very early in development. Mom and DM2 have to control for temperature and humidity. This

Eggs and cold weather

04/18/18: Mrs. North incubates through the snowstorm

This blog was first published on Wednesday, February 26, 2014. It has been updated to reflect Mom’s new mate and includes some information about the Fort St. Vrain eagles as well. Everyone was worried about the eggs in Decorah back in 2014. Iowa was facing a polar vortex while Mom was laying and incubating eggs. While there have been other cold years, 2014 was one for the record books, with windchills of -50F when Mom laid egg #2. Given that 2019

Do bald eagles delay incubation?

February 14, 2019: FSV

This blog was first published on Tuesday, March 29, 2016. It has been updated to reflect new knowledge and events. Do bald eagles delay incubation? It wasn’t an a question we’ve thought about much, since bald eagles in Iowa usually lay eggs in temperatures under – sometimes well under – freezing! However, 2016 was quite a bit warmer, and the eagles in Decorah and Fort St. Vrain seemed to spend more time off the first two eggs than we are used

What is a brood patch?

March 30, 2018: Mrs. North's brood patch

This flashback blog was originally published on February 16 of 2017. Since we’re looking forward to eggs at all of our nests, it seems like a good time to discuss the brood patch – a result of the many hormonal changes that our eagles are experiencing as they come closer to laying eggs.  Press the arrows to view both of the eagles. Robin Brumm and Debbie Fulton got great captures of brood patches from the North Nest (Mrs. North, 2018)