The main crops are apples and pears, followed by table grapes, plums, kiwis, and nectarines. Great spotted kiwis are most closely related to the little spotted kiwi. This large kiwi is one of five species of kiwis residing in New Zealand. Save the Kiwi Conservation Trust, which uses the slogan "Kiwis for kiwi". Jishou produces fruits, especially kiwis and oranges, vegetables, livestock and poultry, and tobacco. Other crops in the area include walnuts, kiwis, olives, peaches, and plums. The ratites are large flightless birds, and include ostriches, rheas, cassowaries, kiwis and emus. Some fruits such as kiwis and strawberries contain ethyl propionate in small amounts. Emus, cassowaries, and kiwis show some dimorphism, predominantly in size. Struthioniformes contained all the ratites, such as the kiwis, emus, rheas, and cassowaries. It is a ratite and therefore related to the emu, ostriches, rheas and kiwis. New Zealanders, informally known as "Kiwis", predominantly live in urban areas on the North Island. Unlike most birds, female great spotted kiwis have two ovaries. The New Zealand Kiwis are currently first in the IRL World Rankings. Great spotted kiwis are monogamous, with pairings sometimes lasting twenty years.