Spring really sprung at our nests this week! Falcons are back at almost every spot, we’re seeing Tundra Swans, Sandhill Cranes, Common Goldeneye ducks, and other migrating waterfowl at the Flyway, Peregrine Falcon Newman is bringing food gifts to mate Michelle, and background birdsong can be heard almost all of our nests. If any of you are good at birdsong ID, please get back to me – we’re looking for someone to help us figure out what we are hearing!
Falcons are coming back all over the place! Newman returned to GSB on February 15th. He was temporarily joined by an unbanded female falcon that forum users christened ‘Cheeky’, but Michelle returned today and presumably showed the interloper the door! Ice-out is imminent on the Flyway cam and watchers are reporting hearing Canada Geese and other birds as spring tide starts flowing northward along the Big River. Worried about mice in our eagle nests? They are not a threat to
Since we weren’t able to get to everyone’s questions during our chat on Explore, we answered them here. Watch the full chat here! https://youtu.be/MCtdzn13aSI. How do eagles feet not freeze? An eagle’s legs use counter-current heat exchange to control body temperature. Warm arterial blood flowing from an eagle’s core into its feet passes cool venous blood flowing the other way. Heat is exchanged, warming the blood flowing into its core and cooling the blood flowing into its feet. The cooler blood
As I’m sure most of you know, we lost an egg in Decorah today. We’re getting a lot of questions about how the eagles respond to loss and how they might feel about the broken egg. It’s a complicated question that we plan to write about tomorrow. In the meantime, it was nice to see Mom and DM2 caring for the remaining two eggs – gently turning them, shimmying over them, and covering them on a warm, bright day. Our
We’re sorry to let everyone know that one of the eggs at N2B has broken. It was stuck to Mom’s feathers when she exited the nest for shift change this morning. The contents were still fluid, which means that the egg wasn’t frozen, and the egg was one of the older/browner eggs. Eggs become stained as they are rolled in the nest, which, until all the eggs have picked up roughly the same amount of color, means that older eggs