Beetles
have two prominent compound eyes, and antennea
of various shapes and sizes that arise between
the eyes. There are more than 300,000 known
species of beetles in the world, a number
approximately equal to that of known plant
species.
Most
species of beetles can fly, most do so only
to cover short distances or to reach vegetation
close to the ground. The rest of their time
is spent crawling on or near the ground or
on vegetation or swimming. Both
beetle larvae and adults are active predators
eating only aphids and other plant eating
insects, such as scales and mites.
Both
adults and larvae live on plants frequented
by aphids, including roses, oleander, milkweed
and broccoli. In the winter, the adults hibernate
in large groups, often in mountains at high
elevations. The female beetle lays eggs only
where she knows aphids are present.