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...social units form groups, they get together and work together for periods of days. They only do this with members of their own clan. The different clans have distinctive ways of moving around the islands. They have different feeding success. In normal years, when the waters are quite cool off the Galápagos, then the regular clan does better. But when they warm up, you...

...work in one environment, stamina, strength or speed may be needed in another. [The image shows a small pack of cream white Arctic wolves howling together in a deserted landscape of rocky rubble and hard frosted ground. There are three adult wolves and two small cubs, with all of the adults howling with one of the two cubs. The other cub is leaning into it's parent wolf. ]...