History
It is though birds evolved from?
Reptiles/Dinosaurs
Keratin makes up what part of a bird?
Feathers
Bird eggs are laid where?
The nest
Birds are able to survive the cold because?
They are warm blooded
Birds migrate when?
Temperature drops
Birds are hard to preserve because?
Hollow Bones
The two types of feathers are?
Down feathers/Contour feathers
Precocial young birds are?
These birds are active as soon as they hatch/independent
Birds lungs have?
One way airflow
Birds have low masses because?
Of hollow bones
The Archaeopteryx is the?
Oldest known bird fossil
Birds have around how many feathers?
25,000
Altrical young birds?
Require the support of the parents for several weeks
Birds are of the class?
Aves
Birds can navigate in what ways?
Topographical landmarks, such as mountains.Magnetic cues, changes in air pressure, and low –frequency sounds
Archaeopteryx is similar to lizards in what ways?
large skull with teeth/bones that weren’t hollow/claws on its forelimbs/long tail.
Two purposes of preening are?
Aligning feathers for optimum waterproofing and insulation/Aligning feathers into most aerodynamic shape/Removing parasites/Removing sheaths from newly molted feathers/Creating healthier appearance to attract a mate/Bonding between mates as a courtship ritual
Bird eggs are cover by what?
Brood patch/ featherless patch of skin
There are around how many orders of birds?
34
How does preening help birds fly?
Aligning feathers into most aerodynamic shape
Fossil records suggest that Archaeopteryx?
glided rather than flew
A muscular organ that kneads and crushes the food
What is the Gizzard?
Bird eggs require what two things?
Warmth/Oxygen
Birds' body temperature ranges from?
40- 46°C, 104-115 °F
The first bird thought to have had sustained flight was?
Ichthyornis