Classification Charadriiformes form a single-order clade. Diversification of Charadriiformes therefore takes place at the suborder and family level. There are three suborders, Charadrii, Scolopaci and Lari. The photos show examples of 12 of the 17 Charadriiforme families described by Harshman J, Brown JW (2008) in The Tree of Life Project

The first suborder, Charadrii , collectively known as shorebirds or waders, includes Chionidae (sheathbills), Burhinidae (thick-knees and stone-curlews), Haematopodidae (oystercatchers), Recurvirostridae (stilts, avocets), Charadriidae (plovers) and some less familiar forms (not shown here). They are primarily birds of shorelines and other open areas, and they walk or wade while feeding. 

The second suborder, Scolopaci, includes essentially ws Jacanidae (jacanas ), Scolopacidae (sandpipers, snipes, phalaropes) and three other families (not shown here).

The third suborder, Lari includes Glareolidae (coursers and pratincoles), Laridae (gulls, terns, skimmers), Stercorariidae (skuas, and jaegers) and Alcidae (auks, murres and puffins). Laridae are long-winged, web-footed birds. The largest, the great black-backed gull (Larus marinus), has a spread of about 165 cm (65 inches). Lari also include auks, murres, guillemots, and puffins. They are streamlined marine birds well adapted for swimming on the ocean surface and underwater. Finally, also included in Lari are the Turnicidae (buttonquails, not shown here).