Park ranger Niki Lake poses as ‘Batty the Clown’ in San Antonio, Texas, USA

Park ranger Niki Lake poses as 'Batty the Clown' in San Antonio in San Antonio where a bachelor colony of Mexican free-tailed bats (Tadarida brasiliensis) live under the bridge. San Antonio, Texas, USA, July 2015.

Park ranger Niki Lake poses as ‘Batty the Clown’ in San Antonio in San Antonio where a bachelor colony of Mexican free-tailed bats (Tadarida brasiliensis) live under the bridge. San Antonio, Texas, USA, July 2015.