Individual and intersexual variation in alarm calls of the White-tailed Hawk

The individual andintersexual variations in the vocalizations of White-tailed hawks were studied.Alarm calls from six resident breeding adult hawks at the Attwater Prairie Chicken National Wildlife Refuge were recorded for a duration of five days. Sonograms of the recorded calls are then generated and measured using a computer software package. Results reveal strong variations in the individual and intersexual calls of the White-tailed Hawks.