Colossopus grandidieri[1] is a nocturnal bush cricket endemic to southwestern Madagascar.

[2] C. grandidieri appears to be omnivorous and is the only member of its genus that has been bred successfully in captivity, with a diet including leaves, fruit, living and dead insects, and processed food including dog food and fish flakes.

The pale brown, cigar-shaped eggs are deposited singly in soil, measuring only 6 mm when laid and swelling in size as they develop over three months to a year.

When confronted, adults rear up on their hind legs, spread their forelegs, and open their mandibles in a defensive posture.

If the disturbing organism approaches, C. grandidieri attempts to grab it with the forelegs and bite it with the jaws.