Check out these links to information on the biology and status of the Pacific Great Blue Heron
http://www.sccp.ca/species-habitat/great-blue-heron-fannini-ssp
http://www.env.gov.bc.ca/wld/documents/heron_s.pdf
http://www.sccp.ca/species-habitat/great-blue-heron-fannini-ssp
http://www.env.gov.bc.ca/wld/documents/heron_s.pdf