Boyd Park is linked ecologically to green spaces to the north, particularly to the Kortright Center for Conservation and Glassco Park. Together these lands form the Boyd Complex, the last large undeveloped tract of land in Vaughan.

Within this area, migratory birds move freely and find the variety of field, forest, and wetlands to their liking. Others, such as the Red-tailed Hawk, are nesting residents, and depend upon the sheer size (about 2500 acres) and diverse fauna of the Boyd Complex to provide food and seclusion.

Large mammals such as White-tailed Deer and Coyote live and move throughout the Boyd area. The former are especially dependent upon seasonally-appropriate food sources scattered throughout the area. In winter they seek sheltering coniferous groves such as are threatened by the proposed Pine Valley Drive projects; during other times of the year they range widely through Boyd's fields and hardwood forests.

Lands within the Boyd Complex are connected inorganically also. For instance, Marigold Creek forms a network throughout the Kortright property, in the Complex's central zone, and would be directly affected by the proposed Pine Valley Drive projects. This creek is a tributary of the East Humber River, which flows through the Boyd area.

The Boyd Complex has been included in a provincial scale Greenbelt and the conservation biology system, known as NOAH.