birds– tag –

A bird opens its wings. A bat does the same. Look more closely, however, and different structures come into view: the bird spreads feathers, while the bat stretches a thin membrane supported by remarkably long fingers. They achieve the s...

Among living birds, some occupy a particularly narrow place within a chosen classification system: their family contains only one living genus, and that genus contains only one living species. In this article, I will call this arrangemen...