Description wikipedia

The Cozumel wren (Troglodytes beani) is a very small passerine bird in the wren family Troglodytidae that is endemic to the small island of Cozumel off the eastern coast of Mexico. The name troglodytes means "hole dweller", and is a reference to the bird's tendency to disappear into crevices when hunting insects or to seek shelter. It was formerly considered to be conspecific with the northern house wren (Troglodytes aedon).