The Northern Harrier, also known as the "Marsh Hawk" for one of its favorite habitats, is a slim raptor with long wings, legs, and tail. The sexes appear different: The male is bluish-gray above with white underparts, a distinctive coloration that earns it the nickname among birders of "Gray Ghost." Meanwhile, female and immature birds are brown with streaked undersides. All have a distinctive white rump, an excellent identifying field mark that can be seen even at a distance. The Northern Harri