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 crane Waterbirds" (AEWA) applies. In Ireland, despite being extinct for over 200 years, the common crane plays a very important part in Irish culture and folklore and so thus recent efforts to encourage it back to Ireland are received with much enthusiasm. The Kranich Museum in Hessenburg, Mecklenburg-Vorpommern, Germany, is dedicated to art and folklore related to the common crane. The common crane is the sacred bird of the god Hephaestus, and it features heavily in the god's iconography. Common crane The common crane ("Grus grus"), also known as the Eurasian crane, is a bird of the family Gruidae, the cranes.