migratory birds in idaho who, why and how? terry rich u.s. fish and wildlife service partners in...
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Migratory Birds in IdahoWho, Why and How?
Terry RichU.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?
What Migrates?
Largest group of daytime migrants – hawks
Depend on rising air currents called thermals
Can see landmarks on the ground wellRiversMountain chains
Diurnal Migration
Thermal Formation
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 NighthawkBlack-chinned HummingbirdWestern KingbirdBarn SwallowYellow WarblerBullock’s OrioleWestern TanagerLazuli Bunting
Breeding Birds that Leave in Winter
Pacific Golden-PloverAmerican Golden-PloverLong-billed DowitcherSolitary SandpiperWestern Sandpiper
Birds that Breed North of Idaho and Migrate through to the South
Rough-legged HawkGyrfalconMerlinSnow BuntingAmerican Tree Sparrow
Birds that Breed North of Idaho and Winter Here
Dark-eyed JuncoSharp-shinned HawkPine SiskinPine GrosbeakBlack Rosy Finch
Altitudinal Migrants
Residents – Don’t Migrate
Partial Migrants
Who is on our feeders in winter?
?
?
?
www.PartnersInFlight.orgwww.SavingOurSharedBirds.org
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