The Eurasian lynx is the biggest of the lynxes, ranging in length from 81 to 129 cm (32 to 51 in) and standing about 70 cm (28 in) at the shoulder. Males usually weigh from 18 to 30 kg (40 to 66 lb) and females weigh 18 kg (40 lb) on average. It has grey to reddish fur with black spots. The pattern of the fur is variable; lynxes with heavily spotted fur may exist close to conspecifics with plain fur. The Eurasian lynx is mainly nocturnal and lives solitarily as an adult. Moreover, the sounds this lynx makes are very quiet and seldom heard, so the presence of the species in an area may go unnoticed for years. Remnants of prey or tracks on snow are usually observed long before the animal is seen.