characteristics of birds

- feathers - forelimbs modified into wings - hindlimbs for walking, swimming or perching - keratinised beaks - lay eggs

bird adaptations for flight (5)

wings - support & propulsion bones - light but rigid respiratory - efficient to meet metabolic demands thermoregulation - maintain constant body temp circulatory system - high pressure

name feather types

wing down tail contour semiplume bristle filoplume

function of contour feathers

aerodynamic purposes. can help bird show off or camoflage

function of down, semiplume and filoplume feathers

insulation purposes

describe feather structure

what are the 4 different wing shapes

passive soaring wing active soaring wing eliptical wing high speed wing

name the 8 different tail types

forked square notched rounded double fan pointed wedged