Fairy wrens: Accountants of the animal kingdom

A puzzling example of altruism in nature has been debunked with researchers showing that purple-crowned fairy wrens are in reality cunningly planning for their own future when they assist in raising other birds' young by ...

Wrens' calls reveal subtle differences between subspecies

Birds' songs and the ways they vary between places have been well studied—but what can the simpler vocalizations known as calls tell us about bird biology? A new study from The Auk: Ornithological Advances provides the ...

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