"I took off for a weekend last month just to try and recall the whole year. All of the faces and all of the places, wondering where they all disappeared." ... Jimmy Buffett (of course)
The Royal Observatory in Greenwich, England, is the home of Greenwich Mean Time (GMT) and the Prime Meridian of the world. A meridian is a north-south line selected as the zero reference line for astronomical observations. The line in Greenwich represents the Prime Meridian of the World - Longitude 0º. Every place on Earth is measured in terms of its distance east or west from this line. The line itself divides the eastern and western hemispheres of the Earth - just as the Equator divides the northern and southern hemispheres.
My first Gambian bird was a Hooded Vulture seen at about 3,000 feet above the ground on approach to the Banjul airport. If you travel to The Gambia and do not see a Hooded Vulture it can only be explained by your not having opened your eyes once during your entire stay!
Hooded Vulture is abundant and conspicuous in The Gambia