Thyroid-Stimulating Hormone (TSH). Guide. A thyroid-stimulating hormone (TSH) blood test is used to check for thyroid gland problems. TSH is produced when the hypothalamus releases a substance called thyrotropin-releasing hormone (TRH). TRH then triggers the pituitary gland to release TSH.
A Raven is black but depending on which way the light hits it they change to other colors like bluish, dark red, or greenish. There are white Ravens but are not albino.
1 Body-olive green color with upper back and background of wings light yellow. 2  Tail Feathers-blueish black and darker than the light green variety. 3  Throat Spots-three black spots on each side. 4  Cheek Patches-purple. 5  NOTE: - Green is sometimes splotchy and may even have a little blue in it.