There are three major families of shorebirds: 1  Waders, about 220 species, include sandpipers, lapwings, snipes, plovers, stilts and various other species. These birds inhabit coasts and shorelines, as well as other open habitats. 2  Gulls, terns, skuas, jaegers and skimmers form a group of a little over 100 species.
The compass was probably invented in the Qin Dynasty (221-206BC) by Chinese fortune-tellers who used the lodestones to construct their fortune telling boards.
1 The magnetic compass was first invented as a device for divination as early as the Chinese Han Dynasty (since about 206 BC). 2  The compass was used in Song Dynasty China by the military for navigational orienteering by 1040â1044, and was used for maritime navigation by 1111 to 1117.