Common poorwill

Scientists believe they are disappearing, partly because they lack adequate hibernation during the winter due to human changes in the environment.

The Chotacabras pachacua is the only known bird that hibernates.

Of all the species of birds in the world, only one that hibernates is known.

The Chotacabras pachacua is a beautifully camouflaged nocturnal bird that lives in arid and semi-arid regions of western North America.

It is a relative of the Chotacabras and is adapted to darkness.

During the colder months, when the insects from which it feeds are scarce, the Chotacabras pachacua enters a prolonged state of lethargy that can last for several weeks or even months.

Its body temperature, heart rate, and metabolic rate drastically decrease.

The Chotacabras pachacua can practically disappear from the landscape, remaining immobile in cracks between the rocks or under a shaded plant cover, mixing so perfectly with its environment that you could walk right next to it without realizing it.