A planned 1,000-acre range on New Orleans’ west bank will serve as a haven for antelope and other species that aren’t breeding as well as zookeepers would like. The idea is to give the animals a chance to roam in herds that zoos don’t have space for. New Orleans’ Audubon Nature Institute and the San Diego Zoo Global Wildlife Conservancy are partners on the project. The Alliance for Sustainable Wildlife hopes to get the first okapi, bongo and giraffes into their 12- to 46-acre pens in October. Okapi — giraffes’ only living relatives — and bongo — large striped antelope native to Africa — are considered near-threatened.