Birder's Night

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Wednesday, January 28th, 2015
7:30 PM to 9:30 PM

Victoria Natural History Society

Return of the Raptors
Populations of raptors—hawks, eagles and falcons—were decimated by massive applications of pesticides in agriculture and in forestry in the decades following WW II. But their populations recovered after DDT was banned in the early 1970s, and nowadays they are a common sight, even in cities. Top predators like raptors have powerful effects on entire ecosystems, most famously illustrated by the reintroduction of wolves to Yellowstone National Park in the 1990s.  In this talk Dr. Ron Ydenberg (SFU) will relate what we now understand about these effects.