This is a video of a Great Blue Heron in Barries Lake. Their main food is fish, small insects, rodents, amphibians (mostly frogs), reptiles, and small birds. Nesting failure is often caused by disturbance by humans. They are vulnerable to wetland habitat change and pesticides. Cambridge plans to discharge subdivision stormwater into the Provincially Significant Wetland Barries Lake. Contaminants are absorbed by animals from their food. Animals higher in the food chain often have very high levels of contaminants because each prey species down the food chain has concentrated the toxins.
Posted on: Tue, 04 Nov 2014 18:58:03 +0000
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