Presentation on theme: "Migratory Birds in Idaho Who, Why and How? Terry Rich U.S. Fish and Wildlife Service Partners in Flight."— Presentation transcript:
Migratory Birds in Idaho Who, Why and How? Terry Rich U.S. Fish and Wildlife Service Partners in Flight
What is Migration? Migration is predictable movement of an animal from one location and climate to another. Linked to food or other resources. Migratory animals generally make one round trip each year. Birds–Breeding and nonbreeding ranges
Why would a bird migrate?
Largest group of daytime migrants – hawks Depend on rising air currents called thermals Can see landmarks on the ground well Rivers Mountain chains Diurnal Migration
River of Raptors (Rio des Rapaces) 4-6 million raptors migrate through every year
Arctic Tern migrates from its Arctic breeding grounds to the Antarctic and back again each year – 19,000 km (12,000 mi) each way!
Most birds migrate only at night Less windy Cooler Few predators Use the stars, sounds, landmarks to find the way Nocturnal Migration
Breeding birds that leave in winter Birds that breed north of Idaho and migrate through to the south Birds that breed north of Idaho and winter here Altitudinal migrants Residents Species with variable behavior Migratory Birds in Idaho
Common Nighthawk Black-chinned Hummingbird Western Kingbird Barn Swallow Yellow Warbler Bullock’s Oriole Western Tanager Lazuli Bunting Breeding Birds that Leave in Winter
Pacific Golden-Plover American Golden-Plover Long-billed Dowitcher Solitary Sandpiper Western Sandpiper Birds that Breed North of Idaho and Migrate through to the South
Rough-legged Hawk Gyrfalcon Merlin Snow Bunting American Tree Sparrow Birds that Breed North of Idaho and Winter Here
Dark-eyed Junco Sharp-shinned Hawk Pine Siskin Pine Grosbeak Black Rosy Finch Altitudinal Migrants