Nature North
http://www.naturenorth.com/spring/creature/shrike/shrike.html
Nature North is a group of conservation-minded organizations working to save the loggerhead shrike in Manitoba.

Wildlife Preservation Canada
http://www.wildlifepreservation.ca/wildlife/shrike.cfm
Wildlife Preservation Canada (WPC) is a charitable organization devoted to saving endangered animal species in Canada and internationally. This is accomplished through focused species conservation and professional training programs, complemented by education and outreach programs. The WPC is an active member of the Eastern Loggerhead Shrike Recovery Project.

Environment Canada - Species at Risk
http://www.speciesatrisk.gc.ca/search/SpeciesDetails_e.cfm?SpeciesID=26
Environment Canada is the leading federal agency in shrike recovery. Among other useful information, its Eastern Loggerhead Shrike page contains plenty of background on recovery activities since 1990.

Bird Studies Canada
http://www.bsc-eoc.org/losh.html
Bird Studies Canada is a Canadian not-for-profit conservation organization dedicated to advancing the understanding, appreciation and conservation of wild birds and their habitats, in Canada and elsewhere. It does this by encouraging activities that engage the skills, enthusiasm and support of its members, volunteers, staff and the public.

Royal Ontario Museum
http://www.rom.on.ca
The venerable Royal Ontario Museum has a shrike page. You can find it by going to the ROM's home page and typing "shrike" (without the quotation marks) in the search engine at the top of the page. When the results pop up, choose the link at the top of the list.

Nova Scotia Museum of Natural History
http://www.museum.gov.ns.ca/mnh/nature/nsbirds/bns0300.htm
It has been more than 20 years since the last Eastern Loggerhead Shrike was spotted in Nova Scotia. Among other things, this site describes the history of shrike sightings in this Maritime province.