The Jacanas [Jacanidae] are a group of tropical waders. They are found worldwide within the tropical zone. They are identifiable by their huge feet and claws which enable them to walk on floating vegetation in the shallow lakes that are their preferred habitat. They have sharp bills and rounded wings, and many species also have wattles on their foreheads. The Lapwings [Vanellinae] are any of various crested plovers, noted for its slow, irregular wingbeat in flight and a shrill, wailing cry. Its length is 10-16 inches. They are a subfamily of medium-sized wading birds which also includes the plovers and dotterels. The Vanellinae are collectively called lapwings but also contain the ancient Red-kneed Dotterel. A lapwing can be thought of as a larger plover.