Zebra A vision in black and white The group of Grévy’s zebras in Cologne Zoo is purely male. These endearing animals do their rounds – sometimes sedately, sometimes at a lively pace – in their enclosure in the northern area of the zoo grounds. Grévy’s zebra Grévy’s zebras do not form stable groups. Instead they live as a group of bachelors, mothers with their foals or solitary individuals. The mares only mate with one stallion. He has to be strong enough to occupy a territory that can be up to 10 km². Other stallions can live in the territory, but without mating. Cologne Zoo keeps a group of stallions for the European breeding programme. As yet they are still too young for breeding. As in the wild, they form a bachelor group and learn through play those behaviours that will later help them to assert themselves against competitors and defend their territory. System: Mammals, odd-toed ungulates Gestation: 13 months Maximum age: 32 years in zoos Body weight: 350–400 kg Habitat: Dry steppes Food: grasses Source: https://www.koelnerzoo.de/ (Status: 24.08.2018)