Bringing Nature Home
The website of Doug Tallamy, Chair of the Department of Entomology and Wildlife Ecology at the University of Delaware and author of a very readable and important book - Bringing Nature Home, How You Can Sustain Wildlife with Native Plants (Timber Press)

Tallamy’s Most Valuable Native Plant Genera
Doug Tallamy's 20 most valuable woody and perennial native plant genera in terms of supporting biodiversity in the mid-Atlantic region

High Park
High Park is the best remaining natural area on the City of Toronto’s Iroquois Sand Plain

Ontario Invasive Plant Council
The Ontario Invasive Plant Council is inactive due to cuts in the Ontario 2019 budget. There are still useful resources on the website. 

Host Plants for Butterfly Caterpillars
While our native butterflies can feed at most nectar plants, native and non-native alike, their caterpillars have very specific requirements for the foliage that they have evolved to digest. Here's a good list, with precautionary warnings, from Garden Web. 
Bill Shotyk's Elmvale farm 
Professor William Shotyk of the U of A is my neighbour and the scientist who found that the groundwater in the Site 41 vicinity is purer than Arctic ice - but that's another story. This is about his passion for planting trees - thousands of them

Ontario Nature 
An important organization that protects and restores natural habitats through research, education and conservation, connecting thousands of individuals and communities across the province. Publishes ON Nature, an excellent magazine that is worth the price of membership.

A Tree Grows in Essa
AWARE Essa's tree project. Favourite trees, book reviews, gallery and more....

Ontario Wildflowers
Just the best for finding out about native (and non-native) wildflowers. Related sites cover trees and shrubs, ferns, grasses and more 

Growing the Medicines
This page from the Six Nations Farmers Market and Garden website offers advice on growing and harvesting tobacco, sage, cedar and sweetgrass.

Monarch Watch
So much useful information about how to assist in the survival of this beleaguered butterfly which migrates from one end of the continent to the other, battling loss loss of food plants and lack of host plants for caterpillars all the way. Get a Monarch Waystation sign to alert the monarchs to all the goodies you've planted for them. Click on the blog for the latest from expert Chip Taylor

Ojibway Prairie Complex
Ojibway Prairie Complex, located in Windsor Ontario, is a collection of five closely-situated natural areas within a 10 minute drive from downtown 

Tall Grass Ontario
Tallgrass prairies and savannas are some of the most endangered ecological communities in Canada. Here's information on how to preserve and restore

Andy's Northern Ontario Wildflowers
Keenly observed, beautifully photographed from Sudbury area.

Ontario Woodlot Association
Lots to learn from this group that caters to those with a few acres or more, but full of info for anyone with an interest in nature

Forest Gene Conservation Association
It's important to source seed from the zone where the tree is to grow. This non-profit promotes conserving genetic diversity in urban and rural landscapes in southern Ontario.