a water thick knee, burhinus vermiculatus, standing on a sandy field in south africa

african bird continent wildlife burhinidae burhinus vermiculatus saharan africa safari animal behavior avian family beak biodiversity monitoring species birding birdwatching conservation status eco tourism ecological environmental protection fauna diversity feathers grassland ground dwelling habitat long legs natural beauty nature reserve ornithology perched plover like sandy field savanna ecosystem south standing terrestrial feeder thick bill water knee wetland wilderness observation