Ready Identifying Replaced Words and Ideas in Informational Texts - Quiz - Level G
Teitung oxygen, WHICH Weileeu Sui vive.
D) Why might a missing call be a sign
But how do scientists actually know whether a rainforest
what a rainforest is in trouble?
is doing well? Some signs of a healthy habitat are easy to
see, such as areas of lush green trees. But others are
harder to spot. Even with so many resident animals,
It signals that the sounds of some
rainforests are so dense that their creatures can easily
animals are changing
remain hidden, making it hard to tell the well-being of any
one animal species
It signals that some animals are hiding
from scientists
Recently, to address this problem, researchers have been
setting up recorders in rainforests to capture the calls of
It signals that the recorders have been
the animals. Listening to these is like putting a
damaged by animals.
stethoscope to a person's heart, though scientists don't
hear just one animal at a time. When they listen, they hear
It signals that a species of animal is no
longer in the area.
dozens of creatures simultaneously lending their voices to
the larger orchestra of rainforest sounds. The more
scientists listen to these kinds of recordings, the more they
notice when expected calls are missing. From insects to
birds, primates to frogs, the absence of a call can be the
first clue that a rainforest might be in trouble.