For male weta, big is better

(PhysOrg.com) -- For a male tree weta, size really is everything. In six of the seven species in New Zealand the males all sport a distinctly large head, and the bigger the head, the better the chance of mating.

Frogs use brains or camouflage to evade predators

Throughout evolution, prey animals have adopted a range of strategies to evade their predators. But often these elaborate strategies come at a cost. For example, looking out for and fleeing from predators involves a great ...

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