These two forest preserves make up the largest tract of mature lowland forest in Lake County and are major birding locations along the Des Plaines River corridor. As such they are two of the best locations for Barred Owl, Red-shouldered Hawk, and Broad-winged Hawk in the area. This area is also a great location for Worm-eating, Mourning, Connecticut, Black-throated Blue, Hooded, and Canada Warblers, Louisiana Waterthrush, Summer Tanager, and both species of cuckoo during migration. They are great spots to visit during the breeding season and spring migration especially.

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