Glucose screening and tolerance tests during pregnancy. A glucose screening test is a routine test during pregnancy that checks a pregnant womanâs blood glucose (sugar) level. A glucose tolerance test is done if a glucose screening test result is higher than normal. It is used to diagnose gestational diabetes. Gestational diabetes is high blood sugar (diabetes) that starts or is found during pregnancy.
The Arctic tern is known to make the longest annual migration in the animal kingdom. During its breeding season, it is found far to the north where summer days are long, and it winters far south in the southern hemisphere, where the days are longest during November to February.he Arctic tern is notorious for its long-distance migration between the breeding grounds and the winter quarters in the Southern Ocean. This knowledge has been obtained by ringing and observations of movements at-sea.
In Spring, the exciting annual North American hummingbird migration begins! These gorgeous birds travel from their winter homes in South or Central America and Mexico to the north. In Fall, hummingbirds will migrate to the warmer climates of South or Central America and Mexico where their is also an abundant food source. However, not all hummingbirds migrate each year. Some will spend the Winter along the western coast of North America.