Here are some links to Canadian info forgive me if you already have seen them:

http://www.ec.gc.ca/

http://www.cws-scf.ec.gc.ca/hww-fap/eng_ind.html

http://publications.pwgsc.gc.ca/publishing/pubindex-e.html

...If you like lichens like I do this will help you ID some of the foliose species in your area ID's great for the genus most anywhere.http://www.for.gov.bc.ca/hfd/pubs/docs/Srs/Srs08.htm

The ocean (Atlantic): http://www.gfc.dfo.ca/habitat/posterhab/elements/espece.htm

This site is from the US and has lots of goodies to download or browse; everything from plant books to fish books it's in the prairie region so you will find it most usefull. http://www.npwrc.usgs.gov/resource/resource.htm

Here is another for birds and bird songs: http://www.mbr-pwrc.usgs.gov/bbs/ident.html

Poisonous Plants of Canada:

http://res.agr.ca/brd/pub/1842/english/html/t1842_e.html

http://www.mbnet.mb.ca/~doctorof/index.html

http://www.uwinnipeg.ca/~wbuhay/ManGeol.htm

http://www.wilds.mb.ca/mns/index.html#mnscontenttag

http://www.brandonu.ca/CNSC/welcome.htm

Flora of Manitoba:

http://home.cc.umanitoba.ca/~burchil/plants/

http://www.escape.ca/~mapb/links.html

http://www2.gov.mb.ca/natres/db/

And a last link: http://www.naturenorth.com/front.html