Harrier (bird) Harrier (bird) A harrier is any of the several species of diurnal hawks sometimes placed in the Circinae sub-family of the Accipitridae family of birds of prey. Harriers characteristically hunt by flying low over open ground, feeding on small mammals, reptiles, or birds. The young of the species are sometimes referred to as ring-tail harriers. They are distinctive with long wings, a long narrow tail, the slow and low flight over grasslands and skull peculiarities. The harriers are thought to have diversified with the expansion of grasslands and the emergence of C4 grasses about 6 to 8 million years ago
Silver gull of the silver gull. As is the case with many gulls, it has traditionally been placed in the genus "Larus", but is now placed in the genus "Chroicocephalus". There are three subspecies: The head, body, and tail are white. The wings are light grey with white-spotted, black tips. Adults range from 40–45 cm in length. Mean wingspan is 94 cm. Juveniles have brown patterns on their wings, and a dark beak. Adults have bright red beaks—the brighter the red, the older the bird. Silver gulls are found in all states of Australia. It is a common species, having adapted well