Mature Christmas beetles eat eucalyptus leaves
The Christmas beetle is found in Australia and are so named because they show up very close to Christmas. They do not drink water but they do get moisture from things they eat such as grasses and leaves.
Beetlejuice land.
Yes
very
No.
water
rain forest
No. Witchetty grubs are the larvae of cossid moths. See the related link. Curl grubs turn into Christmas beetles and other scarab beetles. See the related links.
yes they have to
the beetles
about 10 seconds when I see them