Mating behavior in Galliformes (birds related to chickens)

(1) Wild Turkey

Wild Turkey -- males perform elaborate displays
in forests of the eastern and southwestern United States

Wild Turkey -- males fight each other with spurs

Wild Turkey -- males are much larger than females

Wild Turkey -- hens incubate the eggs without help of a male

Wild Turkey -- hens care for the young without a male

Wild Turkey compared with Ocellated Turkey (Mexico-Guatemala)

(2) Sage Grouse

Sage Grouse -- males gather at places called leks
on sagebrush steppes of western North America

Sage Grouse -- males defend boundaries of small territories

Sage Grouse -- males fight with their wings

Sage Grouse -- males perform elaborate displays

Sage Grouse -- females ready to copulate gather in one male's territory

Sage Grouse -- that one male copulates repeatedly -- other males never