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migration - n. the act of moving from one area to another at different times of the year
alert - adj. able to think clearly and to notice things
decline - v. to become lower in amount or less in number
range - n. the area in which an animal or plant naturally lives
habitat - n. the place or type of place where a plant or animal naturally or normally lives or grows
species - n. a group of animals or plants that are similar and can produce young animals or plants
reflective - adj. causing light, sound, or heat to move away
visible - adj. able to be seen
global - adj. involving the entire world
drought - n. a long period of time during which there is very little or no rain
aerial - adj. performed in the air
insectivore - n. an animal that eats insects
