This preview has intentionally blurred sections. Sign up to view the full version.View Full Document
Unformatted text preview: • Stretches open during the downstroke • Snaps back for upstroke-Body mass centralized, underneath wings-Greatest heart size to body mass ratio of birds (heart mass as a percent of body mass) o Birds .82% o Mammals .59% o Non avian reptiles .51% o Fish .2% o For birds, 350-400 bpm, hummingbirds is 1300-Thermoregulation of birds o Open their mouths a little more and more (gaping) o Or just won’t fly if it’s too hot (+30C) o Or if its too cold (-0C) Pointed wings, low, wingloading, and calm air reduce migratory flight costs in songbirds-...
View Full Document
This note was uploaded on 02/13/2012 for the course BIO 470 taught by Professor Dr.lukebutler during the Spring '12 term at TCNJ.
- Spring '12