The Burhinidae – Thick-knees+ or Burhinidae – Thick-knees and Stone-curlews are medium to large species of Type – wader of the family Burhinidae, and of the Order Charadriiformes. They are concentrated in The Tropics but a few extend to more Temperate Regions. More information on waders can be found here. An interesting feature of these birds is that many of them are nocturnal and partial to drier environments.