Macropus fuliginosus melanops
Head to tail length in western gray kangaroos ranges from 37 inches to 87 inches for males, and from 38 inches to 68 inches for females. Weight ranges from 6.6 to 118 pounds in males, and from 10 to 60 pounds in females. Coloration is light gray-brown to chocolate. The muzzle is fully haired, unlike wallabies and red kangaroos. The enlarged hindquarters are powerfully muscled, and the tapered tail acts as a balance and rudder when leaping, and as a third leg when sitting. They are primarily crepuscular or nocturnal, feeding from late afternoon to early morning and resting during the day. At a slow pace the leaps usually measure 4 to 6 feet, while at increased speeds they may leap 30 feet or more. Normally they do not jump higher than 5 feet. Speeds of about 30 miles per hour are probably attained for short distances when they are pressed in relatively open country. They can exist for long periods without water.
They appear in organized groups called ‘mobs’. In the wild they breed mainly from September to March. Average age at first emergence from the pouch is about 298 days. Lactation usually exceeds 18 months. Males generally become sexually mature at about 29 months, and females at between 20 and 36 months.