why does a venus fly trap eat bugs and animals?

Question

i no they have to eat but why does a plant.. need animals?

Answer 1

Their roots are not capable of extracting nutrients from the soil.

Answer 2

This plant and other plants that also eat insects live in places where the soil is very poor -- especially bogs. The plants need to get nutrients from the insects that most plants get from the soil -- especially nitrogen.

Soil is poor in bogs because the dead plant matter does not decay entirely in the oxygen-poor conditions.

Answer 3

They grow in swamps which usually have soil that is poor in nutrients (like nitrogen) that plants need, because all of the moisture washes minerals out of the soil.

Answer 4

well: see the " VenusFly Trap only eats Insects but not Animals
because one is smaller than of those larger types that do
belong to Nature's Food Chain "
refer http://www.venus.flytrap.com