The wide stream for which this park was named flows through pastoral southern Ontario countryside. Much of the area was once used for agriculture, but most of the park's land is regaining its natural cover of trees and plants typical of the deciduous forest region. Species common to prairie areas and the Carolinian forest are also found in the park.

Most small mammals common to southern Ontario live in the park, as well as some larger species -- white-tailed deer, red fox, coyote and raccoon. Birds in the park include the blue jay, blackbird, red-tailed hawk and several kinds of sparrows, as well as the occasional pileated and red-headed woodpecker, scarlet tanager, turkey vulture and both snowy and short-eared owls. As many as 20 species of amphibians and reptiles also make their home around Bronte Creek. More than 70 species of moths and butterflies have been identified in the park, as well as another 125 species of insects, including a rare katydid.