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Hans Kruuk

Stand Alone

Otters: Ecology, Behaviour and Conservation (Oxford Biology)
Niko's Nature: The Life of Niko Tinbergen and his Science of Animal Behaviour
The Rights of Peoples
The Rights of Peoples (Clarendon Paperbacks)
Niko's Nature: The Life of Niko Tinbergen and His Science of Animal Behaviour
Wild Otters: Predation and Populations
Otters: Ecology, Behaviour and Conservation
Hyaena
The Social Badger: Ecology and Behaviour of a Group-living Carnivore (Meles meles)