Lek mating females away from the hotshot. A manipulative experiment using the little bustard, "Tetrax tetrax", was done to test the various lek evolution models. The experiment involved varying the size and sex ratio of leks using decoys. To test whether or not the presence of a hotshot determined lek formation, a hotshot little bustard decoy was placed within a lek. After the fake hotshot was added to the lek, both male and female visitation to the lek increased. The hotspot model considers the female density to be the catalyst for the clustering of males. This model predicts that leks will form
Tulipa tarda Tulipa tarda Tulipa tarda (late tulip, tarda tulip) is a perennial growing from a bulb. It belongs to the section biflores. By some sources the accepted name is Tulipa urumiensis. It has a leathery tunic that is glabrous on the inside. It has up to seven linear green leaves that can be up to 20 cm long. The stem is between 4 and 20 cm long. The yellow flowers have white tips, anthers and stamen are yellow. "Tulipa tarda" is native to central Asia, growing in rocky subalpine meadows in the Tian Shan. It was confused with "Tulipa dasystemon" for