Ingo Arndt, Animal Architecture

Some amazing images from Animal Architecture, a book by German photographer Ingo Arndt. Above, harvest mouse nest. I once found a family of mice in a nest just like this one, in a field of tall grass, and it was one of the coolest natural things I've ever seen. I couldn't believe that a few blades of grass could hold up a mother mouse and half a dozen babies, but it worked.

The love nest of a male vogelkop gardener bower bird, built solely to attract a mate.

Casings of caddis fly nymphs.

Weaver bird nest.

Surface of the nest of a Eurasian median wasp.

And the nest of a reed warbler.