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Terms in this set (42)
All birds have feathers T/F
Modern birds have a _____ tail and ____ teeth
Short tail and no teeth
Birds have a ___ chambered heart
amniotic egg with hard shell
Oldest known bird is an
Characteristics of archaeophteryx
had teeth and a long tail, it also had clawed wings.
did not have a keeled breastbone like modern birds and must have been a weak flier.
Birds developed from ________ dinosaurs
ratites; flightless birds, including ostriches and emus
Birds with cranial kinesis, large keels to support flight muscles, includes some flightless birds. kneeled sternum
Contour feathers maintain
the shape of birds and provide the lifting surface
Down feathers provide
insulation for the bird
Preening keeps the feathers
in good condition.
Bird bones are pneumatized... meaning
; they contain air. The bones are stiffened with a network of struts.
The sternum (breast bone) on flying birds has a large thin keel for anchoring the flight muscles. T/F
storage chamber at end of esophagus
The digestive, excretory, and reproductive tracts all end in the
The stomach of birds consists of the proventriculus that secretes
gastric juice and a muscular gizzard.
bills are made of
Birds have very efficient flow-through lungs. T/F
Birds have _____ connected to their lungs.
Marine birds excrete excess salt through ______
Colorvision is birds is good T/F
Many birds can see near _______
Flying bird wings have an ____ shape that is cambered (slightly concave) on the ______.
The ______ acts as a slot that allows slower flight without stalling. There is also slotting between the primary feathers on the wing tip.
Have low aspect ratio (short and wide wings)
Aspect ratio is the ratio of length to average width of wings
Found on many small birds
Allows for good maneuverability
Fairly high aspect ratio (long, thin wings)
Swept back, slender tips, low drag
Found on swifts, swallows, and falcons
High speed wings
High aspect ratio
Not good for maneuvering
Utilize sea wings
Example - albatross
Broad wings with lift generating slots and lots of camber
Good for soaring in thermals over land
Many hawks, eagles, vultures
High lift wings
Flapping generates ___ and ____
lift and thrusts
the ______ feathers on the wing tips provide thrust
The ___________ feathers on the inner part of the wings provide an airfoil shape and provide lift
Migration is regulated by the _________
photoperiod, the length of the day. Hormones are released to stimulate fat deposition and other changes needed for migration.`
Many birds use ________________ as a compass.
star patterns, the sun, and polarized light
Many birds can use the earth's ______ to navigate on cloudy days.
Most birds are monogamous
A very few species are ______, one female breeds with several males.
There are a number of bird species that are_________. The males mate with many females. The males of ______ species are often very different in appearance than the females and have spectacular displays to attract females
both parents feed and incubate
________ chicks are "ready to go"
They have down and can run or swim upon hatching
Ducks and most other water birds, quail, and fowl
____--- chicks are naked and helpless when hatched
Most song birds and birds of prey
A bird that lays its eggs in the nest of another species and lets that species raise its young, often at the expense of the hosts young. COWBIRD :(
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