Reading Challenge No 4.

The Wolf Effect.
New Words.

1. Prowl: : to move about or wander stealthily in or as if in search of prey.
2. Ungulates: hoofed typically herbivorous quadruped mammal (as an artiodactyl or a perissodactyl) of a group formerly considered a major mammalian taxon (Ungulata) .
3. Warblers: any of numerous small chiefly Old World oscine birds (family Sylviidae) many of which are noted songsters and are closely related to the thrushes .
4. Elk: a large gregarious deer (Cervus elaphus) of North America, Europe, Asia, and northwestern Africa —called also red deer wapiti c: any of various large Asian deer.

Frum!

I think that this article is true, because it shows how the wolves are important inside the yelowstone national park, in order that they make a balance inside the ecosystem. If they are not in there, the elk would eat up all the plants of cotton and the willows, so thats why the wolves are so important because they feed of the elk and these are afraid about them, therefore they are not so close to these plants since the wolves live in there and the elk avoid to be in dangerous places where they can be hunted.