https://youtu.be/xt5H4YcRsVs
Blue Herons spend nearly 90 percent of their time stalking for food. These large birds are a common sight along ditches on Delta farmland, where they hunt for moles, voles, mice, rats, amphibians, and fish. Standing about a meter tall, these s-shaped necked birds can bend their necks backwards, coiling onto itself and then extending to its full length to spear its prey. They nest in large colonies the biggest near our BC Ferries port in Tsawwassen, with several hundred nesting pairs. The semi-liquid, mostly white droppings can contaminate man-made ponds and concentrated heron droppings can destroy lawns, plants and sometimes kill trees. Herons are most troublesome around ponds containing expensive fish, netting the ponds and motion-activated sprinklers can help to drive them away.
gogreenpestcontrol.ca Ladner Tsawwassen Delta B.C. Bilesky
http://www.delta-optimist.com/opinion/blogs/blog-the-great-blue-heron-1.10395202