You searched for: Place Ann Arbor, Bird Hills Nature Area. Along trail SW from Bird Rd. entrance. Remove constraint Place: Ann Arbor, Bird Hills Nature Area. Along trail SW from Bird Rd. entrance. Place Michigan Remove constraint Place: Michigan Place North America Remove constraint Place: North America Place Washtenaw Remove constraint Place: Washtenaw Topic Rhamnaceae Remove constraint Topic: Rhamnaceae Topic Rhamnus Remove constraint Topic: Rhamnus