Migratory Caspian Terns take off from sandbank in estuary

vlei olifants river estuary sand bar sandbank estuary nature reserve shore wetland waterbirds wetlands coast migratory atlantic nature no people south africa conservancy coastal birds drone shot caspian terns aerial terns aves natural wild birds outdoors nobody wildlife flight take off flock fly avian ornithology stick together in flight flock together birdwatching