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Tag Archives: FSV Eagles

Eggs and cold weather

February 20, 2019 RaptorResource

<img width="175" height="175" src="https://www.raptorresource.org/wordpress/wp-content/uploads/2018/12/041818-dnn-175x175.jpg" class="alignleft wp-post-image" alt="04/18/18: Mrs. North incubates through the snowstorm" srcset="https://www.raptorresource.org/wordpress/wp-content/uploads/2018/12/041818-dnn-175x175.jpg 175w, https://www.raptorresource.org/wordpress/wp-content/uploads/2018/12/041818-dnn-150x150.jpg 150w, https://www.raptorresource.org/wordpress/wp-content/uploads/2018/12/041818-dnn-400x400.jpg 400w, https://www.raptorresource.org/wordpress/wp-content/uploads/2018/12/041818-dnn-85x85.jpg 85w, https://www.raptorresource.org/wordpress/wp-content/uploads/2018/12/041818-dnn-45x45.jpg 45w" sizes="(max-width: 175px) 100vw, 175px" />

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

Read more Decorah Eagles, Decorah North Eagles, Fort St. Vrain Eagles, News

Do bald eagles delay incubation?

February 15, 2019 RaptorResource

<img width="175" height="175" src="https://www.raptorresource.org/wordpress/wp-content/uploads/2019/02/021419-fsv-1-175x175.jpg" class="alignleft wp-post-image" alt="February 14, 2019: FSV" srcset="https://www.raptorresource.org/wordpress/wp-content/uploads/2019/02/021419-fsv-1-175x175.jpg 175w, https://www.raptorresource.org/wordpress/wp-content/uploads/2019/02/021419-fsv-1-150x150.jpg 150w, https://www.raptorresource.org/wordpress/wp-content/uploads/2019/02/021419-fsv-1-400x400.jpg 400w, https://www.raptorresource.org/wordpress/wp-content/uploads/2019/02/021419-fsv-1-85x85.jpg 85w, https://www.raptorresource.org/wordpress/wp-content/uploads/2019/02/021419-fsv-1-45x45.jpg 45w" sizes="(max-width: 175px) 100vw, 175px" />

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

Read more Decorah Eagles, Decorah North Eagles, Fort St. Vrain Eagles, News

1st Egg for the Fort St. Vrain Eagles!

February 14, 2019 RaptorResource

<img width="175" height="175" src="https://www.raptorresource.org/wordpress/wp-content/uploads/2019/02/021419-fsv-175x175.jpg" class="alignleft wp-post-image" alt="February 13, 2019: 1st egg for the FSV eagles!" srcset="https://www.raptorresource.org/wordpress/wp-content/uploads/2019/02/021419-fsv-175x175.jpg 175w, https://www.raptorresource.org/wordpress/wp-content/uploads/2019/02/021419-fsv-150x150.jpg 150w, https://www.raptorresource.org/wordpress/wp-content/uploads/2019/02/021419-fsv-400x400.jpg 400w, https://www.raptorresource.org/wordpress/wp-content/uploads/2019/02/021419-fsv-85x85.jpg 85w, https://www.raptorresource.org/wordpress/wp-content/uploads/2019/02/021419-fsv-45x45.jpg 45w" sizes="(max-width: 175px) 100vw, 175px" />

Congratulations to Xcel Energy’s Fort St. Vrain eagles on their first egg of the year! It arrived at 8:40PM MT on February 13th – a perfect Valentines Day treat for all of us today! This video by Elfruler shows the entire event: https://youtu.be/koO15X2PDMU. I love the new egg and the ducks in the background. This seems like a good time to revisit the whole subject of incubation: https://raptorresource.blogspot.com/2016/03/do-bald-eagles-delay-incubation.html. This blog was first published on Tuesday, March 16.

Read more Fort St. Vrain Eagles, News

How long does it take a bald eagle to lay an egg?

February 10, 2019 RaptorResource

<img width="175" height="175" src="https://www.raptorresource.org/wordpress/wp-content/uploads/2019/02/Cross-sectional-diagram-of-avian-egg-web2-175x175.jpg" class="alignleft wp-post-image" alt="An egg in cross section, modified from Romanoff and Romanoff, 1949" srcset="https://www.raptorresource.org/wordpress/wp-content/uploads/2019/02/Cross-sectional-diagram-of-avian-egg-web2-175x175.jpg 175w, https://www.raptorresource.org/wordpress/wp-content/uploads/2019/02/Cross-sectional-diagram-of-avian-egg-web2-150x150.jpg 150w, https://www.raptorresource.org/wordpress/wp-content/uploads/2019/02/Cross-sectional-diagram-of-avian-egg-web2-400x400.jpg 400w, https://www.raptorresource.org/wordpress/wp-content/uploads/2019/02/Cross-sectional-diagram-of-avian-egg-web2-85x85.jpg 85w, https://www.raptorresource.org/wordpress/wp-content/uploads/2019/02/Cross-sectional-diagram-of-avian-egg-web2-45x45.jpg 45w" sizes="(max-width: 175px) 100vw, 175px" />

This blog was first posted on Thursday, February 22, 2018. While it was written about Mom and Dad Decorah, it applies to all of the eagles we watch. We’ve talked about how long it takes bald eagle eggs to hatch after they are laid (an average of 38 days from first egg to first hatch in Decorah), how long hatch takes once pip starts (it can take upwards of 24 hours), and how long it takes Mom to lay each

Read more Decorah Eagles, Decorah North Eagles, Fort St. Vrain Eagles, News

Friday Nestflix!

February 8, 2019 RaptorResource

<img width="175" height="175" src="https://www.raptorresource.org/wordpress/wp-content/uploads/2019/02/020819-facebook2-175x175.jpg" class="alignleft wp-post-image" alt="February 7, 2019: Mom at N2B" srcset="https://www.raptorresource.org/wordpress/wp-content/uploads/2019/02/020819-facebook2-175x175.jpg 175w, https://www.raptorresource.org/wordpress/wp-content/uploads/2019/02/020819-facebook2-150x150.jpg 150w, https://www.raptorresource.org/wordpress/wp-content/uploads/2019/02/020819-facebook2-400x400.jpg 400w, https://www.raptorresource.org/wordpress/wp-content/uploads/2019/02/020819-facebook2-85x85.jpg 85w, https://www.raptorresource.org/wordpress/wp-content/uploads/2019/02/020819-facebook2-45x45.jpg 45w" sizes="(max-width: 175px) 100vw, 175px" />

Happy Fri-yay, everyone! Grab the popcorn and look for great close-ups, two food fights, and very cool fly-ins and vocalizations in Decorah, and a pellet casting and nestorations at our Fort St. Vrain nest. thanks to our excellent crew of camera operators and video makers for finding and sharing special moments in the nest with us! Looking for something to do besides watching eagles? We’ve added a prey log feature to our website. To submit your prey observations, go to

Read more Decorah Eagles, Fort St. Vrain Eagles, News

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