Some of the most SUCCESSFUL species of bats live in large cave colonies. What does successful mean in this sentence?
doing well
Some of the most successful species of bats live in large cave COLONIES. Some of these COLONIES have millions of members, even up to 20 million!
group
So, why don't bats fly into things at night? They use echolocation to LOCATE food and avoid obstacles.
find
They use echolocation to locate food and avoid OBSTACLES.
something that stops forward movement or progress.
These subsonic noises VARY in length and pulse frequency, and are unique to the individual.
to be different
Each bat recognizes its own pulse reflections, or "voice," and uses it to avoid objects and to IDENTIFY food.
to figure out or show who someone is or what something is.
The bats simply IGNORE their personal navigation systems inside the caves. The echolocators are on, but the bats aren't listening.
pay no attention to
COMPARED to a bug, a human being is a very large, [slow-moving] sound-reflecting surface. Outside of the cave, the chance of a bat hitting a person is very slim!
how something is the same or different, comparing.
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