#Migratorybirds are on the move, even up in #Alaska! Some #graycrownedrosyfinches are considered altitudinal migrants, moving from lower elevations in winter to breed high in the mountains. 🎥description: Gray-crowned rosy finches perch in a Sitka Spruce. 🎥 Peter Pearsall/USFWS https://t.co/DNxeDukrPi#Migratorybirds are on the move, even up in #Alaska! Some #graycrownedrosyfinches are considered altitudinal migrants, 7939722 #Migratorybirds are on the move, even up in #Alaska! Some #graycrownedrosyfinches are considered altitudinal migrants, moving from lower elevations in winter to breed high in