Ottawa National Wildlife Refuge Complex Expansion and Detroit River International Wildlife Refuge Expansion Act

Ottawa National Wildlife Refuge Complex Expansion and Detroit River International Wildlife Refuge Expansion Act - Expands the Ottawa National Wildlife Refuge Complex to include specified land and water in the State of Ohio. Permits the Secretary of the Interior to acquire by donation, purchase, or exchange the land and water and interests in land and water within the boundaries of the Complex.

Expands the southern boundary of the Detroit River International Wildlife Refuge (the Refuge) to include additional land and water located in the State of Michigan east of Interstate Route 75.

Prescribes requirements for administration of the Complex.

Directs the Secretary to ensure that hunting, trapping, fishing, wildlife observation and photography, and environmental education and interpretation shall be the priority public uses of the Complex.

Requires the Secretary to encourage the State of Ohio to use authority under the recreational trails program under Federal law to provide funding for the acquisition and development of trails within the boundaries of the Complex.

Directs the Secretary, acting through the Director of the United States Fish and Wildlife Service, study and report to Congress on fish and wildlife habitat and aquatic and terrestrial communities in and around two specified dredge spoil disposal sites in Toledo Harbor.