143355 Rabbit - Black Form Oryctolagus cuniculus Length 40-55cm Familiar, long-eared social burrowing mammal. Lives in tunnel complexes called warrens. Mainly nocturnal or crepuscular; diet is vegetarian. Adult has mainly greyish brown fur with rufous nape and pale greyish underparts. Long ears have rounded, brown tips and tail is dark above and white below. Legs are long but relatively shorter than those of Brown Hare. squeals loudly in alarm. Introduced to Britain but now widespread and common in grassland, scrub and on roadside verges.