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.
The earliest compasses were made of lodestones. This mineral is made of iron oxide which orients itself to a north and south axis.In 1117 Zhu Yu's book Pingzhou Table Talks came out. It was the first time in the history of the compass that the device was mentioned as a tool for navigation.he first compass was invented around the year 1044. Modern liquid  magnetic compasses stem from the mariners compass that was invented  in Europe around 1190.