A (23) | B (24) | C (45) | D (19) | E (25) | F (18) | G (15) | H (14) | I (14) | J (2) | K (3) | L (9) | M (15) | N (11) | O (10) | P (34) | Q (3) | R (22) | S (30) | T (14) | U (3) | V (9) | W (7) | Z (2)
Native species

An animal that has always lived in a certain area and is naturally found there.

Natural resources

Materials found in nature that are used by people, such as sunshine, water, air, soil, minerals, forests, and wildlife.


The neck-swinging behavior seen between male giraffes, usually as part of dominance and courtship rituals.


The sugary fluid produced by many flowers and ingested by many insects, some birds, and a few mammals.


Having a distribution including Central and South America.

New World

Animals native to Central and South America. For example, New World monkeys are those found in Central and South America.


An animal's role within its habitat.

Nictitating membrane

An inner, third eyelid present in many land animals. Some can slide this across the eye (from the inner corner) to clean or protect the eyeball.


Awake and active during the night, asleep during the day.


An animal that roams from place to place, never staying in one area very long.


Natural resources that do not replenish themselves readily.