Avian hippoboscid flies — also called flat flies and louse flies — survive on bird blood. Estimates vary for the number of different species in our region, but there are likely more than 10 ...

We have long suspected that these formations might help birds fly with less effort, but the precise mechanics of this phenomenon have remained unknown—until now. Expending less effort in long ...

But a pesky detail puzzled Huxley: Small, ground-dwelling South American tinamous didn't seem to fit neatly with the ratites or other birds. Tinamous fly, albeit reluctantly. And they possess ...