In the Northern Hemisphere, winter generally begins on December 21 or 22. This is the winter solstice, the day of the year with the shortest period of daylight. Summer begins on June 20 or 21, the summer solstice, which has the most daylight of any day in the year. Spring and fall, or autumn, begin on equinoxes, days that have equal amounts of daylight and darkness. The vernal, or spring, equinox falls on March 20 or 21, and the autumnal equinox is on September 22 or 23.
Over utilized plants and animals are those plants and animals which are almost going out of existence or are already extincts as a result of over use by humans. Examples of over utilized animals include: West African Black Rhinoceros, Passenger pigeon, Sea mink, Tecopa pupfish, Pyrenean ibex and Tasmanian tiger.
Displacement is shortest distance from starting point, 4km.
