Decorah Eagles and Blogs

Nestflix: Decorah and Decorah North

January 9, 2020: DM2 and Mom

We have your videos and a little more! I saw an article on parrots and altruism this morning that I wanted to share. Followers often wonder what kind of internal lives our eagles have. Over the years, we’ve seen them experience what looks like pleasure (sunbathing, preening, sibling cuddle puddles, bonding, and many other moments), confusion and fear (Mom’s plaintive pealing after Dad’s disappearance), and even annoyance (think of those Beakerson’s moments). Parrots and eagles live in very different ways,

Nestflix: Decorah, Decorah North, and the Mississippi Flyway

January 6, 2020: Mom and DM2 disagree on stick placement

I loved all of tonight’s videos, but I was particularly intrigued by the fourth video down. We’ve speculated about our eagles ‘farming’ sticks, or preparing them for removal and transport to the nest. What would that look like? They might weaken sticks by twisting and pulling them or strip bark from sticks to girdle them. Look at the ninth minute of the video, where DM2 appears to be preparing sticks, and check the 11th minute, where he appears to be

A Tale of the Tape …. at the Hatchery Nest

January 7, 2019: N2B

by Sherri Elliott The Decorah Eagles nest this morning gives a great look at the depth already this season as DM2 and Mom pause work to track their territory. There are two things I look at every view…a lovely heart shape circled in the bark of the cottonwood tree, as well as the diamond shape in the bark which I have always used as a tape measure. During the N2B starter platform build in 2015 (video here), the bottom of

Where is D27?

January 5, 2020: D27's map

D27 rang in the New Year about four miles from her natal nest! A mild winter tends to result in more abundant food during the lean season: rivers are open for fishing, animals tend to forage in the (relatively) warm weather, and the folded hills and valleys in and around Decorah provide seemingly endless choices for perching and roosting. Happy 2020, D27 – and don’t forget to write! I’ve included a few images of maps from the eagles we’ve tracked

What is a brood patch?

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

Daylight length, or photoperiod, strongly influences hormone production in birds. In the northern hemisphere, our story begins shortly after the winter solstice in December. As daylight length increases, a cascade of hormones causes birds’ gonads to swell in preparation for reproduction, egg-laying, and incubation. In this blog, we’ll discuss the role the brood patch plays in incubation and determining clutch size. How do bald eagles keep their eggs warm in subzero temperatures? They apply heat via a special area of

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