| A | B |
|---|
| fowl-like birds | game birds |
| passerine | perching birds ("songbirds") |
| nonpasserine birds | land birds (pigeons, doves, hummingbirds, woodpeckers...) |
| birds of prey | raptors |
| some birds of prey | kites, accipiters, harriers, buteos, eagles, hawks, falcons |
| osprey | the only raptor that plunges into the water |
| falcons | eat birds, rodents, fish |
| owls | nocturnal - mainly |
| neotropical migrants | birds which winter in the tropics and migrate to No. Am. to mate and raise their young |
| oviparous | organisms taht lay eggs that develop OUTSIDE the female's body |
| monogomous | having only one reproductive partner |
| biomagnification | the concentration of substances in animal tissues as the substances pass through ecosystem food webs |
| cavity nesters | animal species that use cavities in trees for homes and nesting sites (blue birds, wood ducks, flying squirrels, owls, some raptors) |
| pelage | the hair or "fur" of a mammal |
| viviparous | giving live birth |
| monotremes | egg laying mammals |
| marsupials | mammals whose young develop inside the body for a short time and complete their development outside the mother's body inside a pouch |
| placentals | mammals that carry the young inside the mother's body until completely or almost completely developed |
| placenta | a specialized structure from which the embryo recieves nutrients and oxygen and eliminates wastes |
| gestation | the period of time that placental mammals develop inside the mother |
| embryonic diapause | (delayed implantation) the stopping of early development to allow yound to be born when environmental conditions favor survival |
| countershading | contracting coloration that helps conceal an animal (dark on topside; light on the bottom side) |
| NC's state mammal | gray squirrel |
| mammals | backbones; warm-blooded; most have fur/hair; young develop in mother's body; feed their young milk; care for their young |
| delayed fertilization | some animals mate, but delay the fertilization until spring |
| pheromones | a chemical that is produced and secreted to the outside of the body; perceived by smell by other organisms |
| echolocation | the production of and interpretation of returned high-pitched sound, used to detect objects or prey, as with a bat |
| thermoregulation | heat regulation or control of the body heat (maintain a relatively high body temp.) |
| aestivation | (NOT hibernation) being inactibe in dens or burrows) used to endure hot, dry weather |
| hibernation | a dormant state of decreased temp & metabolism |
