Labels:text | screenshot | document OCR: fall rut. Pregnant cows and young animals retain their antlers until May or June. Other cows usually shed their antlers in April or early May. A single calf is born in late May or early June. Unlike moose, twin births are very rare. Newborn calves can walk within an hour and can run fast after a few days. Wolves are the traditional predator of caribou, but grizzly bears also capture very young calves. Adolph Murie wrote: "Encour- aged by their early-season success, the bears continue chasing calves long after the calves have gained strength and speed enough to escape. After a few failures, I suspect that a grizzly learns that the calf- catching season has passed and is no longer tempted to gallop ponder- ously and fruitlessly with excess power but not sufficient fleetness to capture fleein ...
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