Head and body length: 40 - 45 cm, Wingspan 56 - 66 cm
Males: 0.9 - 1.2 kg, Females: 0.75 - 0.95 kg
Estimated at 460,000 mature individuals
Primarily mixed and tall-grass prairie
Room to boom. Males greater prairie-chickens establish booming grounds during season where they announce their prowess through vocalization produced via their bright orange neck sacs. To impress females, they also strut and "flutter jump ," flapping their wings and jumping with a whoop, crackle or whine. females, who usually visit more than one booming ground prior to mating, lay clutches of about a dozen eggs in a bowl-shaped nest lined with dry grass and feathers. But as their native prairies are converted to crop lands, they are feeling the squeeze. Population has fallen by 90% in the last 40 years.