Animal behaviour in its own proper context.

http://www.metafilter.com/168432/Animal-behaviour-in-its-own-proper-context

Why Animals Do The Thing is a Tumblr blog focused on animal science education.
They often explain animal news articles and debunk anthropomorphic beliefs about nature.
Topics: Cats, Dogs: training, expressions, toxic food. Horses and Goats, Wolf packs, Snakes, Zoos and the AZA. They also have some cute pictures.

bonus porcupine