In a segment for CBC Quirks and Quarks, microbiologist Dr. Emma Allen-Vercoe shared some insights on bird feces, particularly why it appears white in colour.  

Birds have just one place to excrete waste and tend to urinate at the same time they release stool, she said. 

A professor in the Department of Molecular and Cellular Biology, Allen-Vercoe researches microbes, particularly those in the human gut.