Man Waded into Tower of Bird Poo ... For Science!...
Photo: Chris Grooms/Queen's Univ... ...tower of bird excrement in an abandoned chimney on campus and realized they can use it... ...f insect-eating birds, in particular, chimney swifts . Chimney swifts roost in smoke stacks of all kinds...
https://www.neatorama.com/2012/04/18/man-waded-into-tower-of-bird-poo-for-science/
