Raptor Resource Project: Bald Eagle and Bird of Prey Cams

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Monthly Archives: November 2017

Eagle Eyes!

November 19, 2017 RaptorResource

Has anyone ever called you eagle-eyed? Relative to humans, bald eagles have larger, sharper eyes that see further, collect more details, and produce stereoscopic vision to greatly improve depth perception. A bald eagle’s visual acuity begins with its eye size and shape. Dad’s somewhat tubular eyes occupy over 50% of the volume of his skull, as compared with less than 5% in us spherically-eyed human types. He can voluntarily adjust the curvature of his large cornea and lens (we’re restricted

What’s on the Menu at Fort St. Vrain?

September 11, 2017 RaptorResource

So what’s on the menu at Fort St. Vrain? While we were up in the nest, I decided to collect prey remains. We don’t have the necessary permits to take feathers (of which I found only two, both belonging to prey), but there were plenty of skulls and a few turtle shells. I got them home, laid them out on a table, and started ID’ing them. Some Moms bring home t-shirts and postcards. I bring home skulls and photos of

Persistence Pays Off – a post by Brett Mandernack about the fitting of D27’s transmitter.

August 8, 2017 RaptorResource

It is early August and I have one satellite transmitter (or PTT) yet to deploy on a young eagle. Dave and Ann Lynch spent two solid weeks in late June/early July perfecting their craft of artful presentation of fish to the Decorah fledglings, yet the “kids” instead chose to food-beg loud and often and insist Mom or Dad bring them food at the nest. There was no evidence of any of the fledglings ever picking up a fish during that

Who is that eagle with a transmitter?

February 13, 2017 RaptorResource

We started to get reports in January of an eagle with a transmitter near Lock and Dam 14, which stretches across the Mississippi river between Le Claire, Iowa and Hampton, Illinois. Like most large lock and dam systems, LD 14 has open water even in the coldest weather, making it a popular place for wintering bald eagles. Of course wintering bald eagles attract photographers, and some of those photographers noticed that one of the eagles had a transmitter on its