flying thick-billed murres big flock

air animal animals arctic barents behavior bird birds birdwatcher birdy brunnichs covered daily ecology feathers flew flight flock fly flying frantz glacier guillemot guillemots hovering ice ichthyophagi inhabitants josef land life lighter lightweight lit lomvia maneuvering missile murres north ocean of ornithology outlet pens piscivorous pole rookery rulers sea sky species spot thickbilled tundra uria voices watching white zoology