praying mantis
The insect that has ears on its front legs are crickets.
Some grasshoppers make sounds with their back legs but they do not have ears there.
A wallaroo is essentially grey in colour. It has distinctive dark colouring on its extremities, such as forelegs, hind limbs, tail, nose, ears and face.
Could be an insect bite.
yes it's called a gastemnem
Ear-wig; named as such due to it's propensity to crawl into the ears of animals.
an elephant and an insect eating bat.
Yes. biantipedal means two forelegs in Greek and Latin.
very loud noises shock the insect sometimes killing them and if they are lucky they become deaf.
The distance is measured on the time it takes the sound to return to the bats ears...
Personally i think that the apatosaurus could not crush it attackers with its forelegs because the attackers would have to be miniscule.