One of the most striking characteristics of St. Johns Conservation Area is the predominace of a natural hardwood forest stand.  This area is part of a relatively small Deciduous/Carolinian Forest Region in Canada. The Carolinian Forest Region is characterized by an abundance of broad-leafed species and a scarcity of evergreens.  Over 400 species of vascular plants have been identified, growing in their natural setting in this area.  As well, more than 80 mushroom species have been identified here.

The abundance and diversity of naturally occurring vegetation creates ideal wildlife habitat.  Consequently, this area is richly endowed with wildlife resources including upland and small game, ungulates, reptiles, amphibians, aquatic life, and many resident and migratory bird species.  The main pond has been home to at least one family of Canada geese for many years.

Mature Carolinian forests, wetlands and pond environments attract waterfowl and other species.  Rare and endangered species have been recorded nesting at St. Johns