Elk 和 Moose应该都是麋鹿。“ large northern deer with

enormous flattened antlers in the male; called `elk' in Europe and `moose' in North America”
就象对驯鹿北美与欧洲的叫法也不同：
“arctic deer with large antlers in both sexes; called `reindeer' in Eurasia and `caribou' in North America”