BIOL 1902 Lecture Notes - Lecture 5: Turkey Vulture, Arctic Tern, Monarch Butterfly
15 Feb 2018
School
Department
Course
Professor
F-5a
Many animals escape sub-zero temps by leaving
Migration
What animals migrate? Monarch butterflies, birds
Many birds including geese and insect eating songbirds
They leave primarily bc of food but this also solves the cold temp problem
Monarch butterflies migrate to mexico
Some dragonflies migrate
Common green darner-migrate
“oe bats do’t igrate
A few species of bats migrate (red bats do)
Most birds migrate and travel tremendous distances
Scarlet tanagers fly to brazil
Arctic tern, ex-world champion-20,000 km roundtrip each year,arctic to africa to Antarctica
New champion: red knot- sandpiper
One knot flew 26,700 km (16,600 miles) round trip
Fat powers the flight
Doubles its body weight in 10 days
Most songbird migrate only at night
Fly 300-500 km
Fly at night- less wind at night, fewer predators, cooler at night, calmer,safer
But some birds migrate in daytime and still conserve energy
Turkey vulture
Hawks and eagles and vultures soar up on a thermal then glide down to the next thermal and then soar
up on it- thermal hopping- they need sunshine to create thermals
Cambered airfoil- birds wing, top is going faster, low pressure on bottom, pushed up by lift
Spaces bw feathers- slots
Slotted wing feathers for extra lift
Flapping- burns energy
find more resources at oneclass.com
find more resources at oneclass.com
Document Summary
Many birds including geese and insect eating songbirds. They leave primarily bc of food but this also solves the cold temp problem. A few species of bats migrate (red bats do) Arctic tern, ex-world champion-20,000 km roundtrip each year,arctic to africa to antarctica. One knot flew 26,700 km (16,600 miles) round trip. Fly at night- less wind at night, fewer predators, cooler at night, calmer,safer. But some birds migrate in daytime and still conserve energy. Hawks and eagles and vultures soar up on a thermal then glide down to the next thermal and then soar up on it- thermal hopping- they need sunshine to create thermals. Cambered airfoil- birds wing, top is going faster, low pressure on bottom, pushed up by lift. They are fast fliers and burn up a lot of fuel when they move. They eat flying insects and need to feed as they migrate.
