Dunnock two or three adjacent female territories overlap one male territory, and so polygyny is favored, with the male monopolising several females. Polygynandry also exists, in which two males jointly defend a territory containing several females. Polyandry, though, is the most common mating system of dunnocks found in nature. Depending on the population, males generally have the best reproductive success in polygynous populations, while females have the advantage during polyandry. Studies have illustrated the fluidity of dunnock mating systems. When given food in abundance, female territory size is reduced drastically. Consequently, males can more easily monopolise the females. Thus, the mating
Common ostrich racing. Chandler, Arizona, hosts the annual "Ostrich Festival", which features common ostrich races. Racing has also occurred at many other locations such as Virginia City in Nevada, Canterbury Park in Minnesota, Prairie Meadows in Iowa, Ellis Park in Kentucky, and the Fairgrounds in New Orleans, Louisiana. Common ostrich The common ostrich ("Struthio camelus"), or simply ostrich, is a species of large flightless bird native to Africa. It is one of two extant species of ostriches, the only living members of the genus "Struthio" in the ratite order of birds. The other is the Somali ostrich ("Struthio molybdophanes"), which was recognized