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provide food and cover for a lot of wildlife

make the wetlands smaller

lead to

keep fishing

prevent all these things in Zhalong

record their types and changes in their numbers

understand the importance of the wetlands

in Northeast China

one of the world's most important wetlands

all year round

for a short stay

in order to

provides

food

and

cover

for

in

the

daytime

easily

watch

them

there

in

order

to

more

space

for

need

to

count

the

importance

of

take a camera to take photos of the birds

need sb. to do sth.

write down

to

watch

for

any

reason

some

birds

sing

fly

south

for

the

winter

cover

red-crowned crane

binoculars

and

describe

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