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.
exists and is an alternate of . In 1597 Galileo invented the geometric compass he called it Military compass because it could be used to aim cannons. He added more scales to the This made it useful for working out squares and cubes , multiplying, and computing compound interest. He added a curved metal arc that joined the two right angles.