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Why are white-winged crossbills drawn to yellow snow? April 8th 11:52 am | Ned Rozell, University of Alaska     While out on a springtime snow trail, I recently saw a dozen white-winged crossbills pecking at snow on the side of the trail. When I reached the spot, I saw a yellow stain from where a team of dogs had paused. Last spring, I saw a bunch of crossbills gathered near an outhouse. They were congregated at a communal pee spot in the snow. The birds were poking at it. Why might songbirds have a thing for yellow snow? I put that question up on a forum used by bird lovers who live here in the boreal forest - the immense swath of spruce, birch, aspen, poplar and willow that stretches from the shores of the Bering Sea to the coast of the Atlantic Ocean.

United statesWestern michigan universityAtlantic oceanSarah kellerKathryn hersonBering seaNed rozellMichigan universityGeophysical instituteCornell lab of ornithologyUniversity of alaska fairbank geophysical instituteCornell labSalt eatingAlaska fairbank geophysical instituteஒன்றுபட்டது மாநிலங்களில்மேற்கு மிச்சிகன் பல்கலைக்கழகம்