Male Impala with curved horns chasing and scenting a female, Grumeti, Tanzania

Beta male Gray Wolf (Canis lupus) Grey Wolf fending off alpha female advances in fresh winter snow, Montana, USA.

Alpha female Gray Wolf (Canis lupus) Grey Wolf with subordinate males, Montana, USA.

Mackenzie Valley Wolves, Canadian Timber Wolves (Canis lupus occidentalis) in the snow, fight for rank order, alpha female, right, reprimanding a young wolf, in front of the pack

Mackenzie Valley Wolves, Canadian Timber Wolves (Canis lupus occidentalis) in the snow, fight for rank order, alpha female, right, reprimanding a young wolf, in front of the pack

Pink Salmon (Oncorhynchus Gorbuscha) Probes Her Redd While Her Alpha Male Guards In An Alaska Stream During Summer.

Abyssinian wolf (Canis simensis) Alpha she-wolf and 1 month old wolf cubs, Web Valley, Bale mountains, Ethiopia