Madagascar Hissing Cockroaches are one of the largest cockroaches: adults can reach 2 to 3 inches in size. Hissers have a relatively long life span and, under optimal conditions, they can live up to 5 years!. Hissing cockroaches don’t have wings but are excellent climbers, including on smooth glass. Therefore, they should be kept in an enclosure with a lid to ensure they do not escape. They make their homes in rotting logs and wood and should be fed by providing fresh pieces of vegetables in their enclosure.