Among these reservations are the celebrated Pelican Island rookery in Indian River, Florida; the Mosquito Inlet Reservation, Florida, the northernmost home of the manatee; the extensive marshes bordering Klamath and Malhuer Lakes in Oregon, formerly the scene of slaughter of ducks for market and ruthless destruction of plume birds for the millinery trade; the Tortugas Key, Florida, where, in connection with the Carnegie Institute, experiments have been made on the homing instinct of birds; and the great bird colonies on Laysan and sister islets in Hawaii, some of the greatest colonies of sea birds in the world.