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Yn ôl Wikipedia: A passerine is a bird of the order Passeriformes, which includes more than half of all bird species. Sometimes known as perching birds or, less accurately, as songbirds, the passerines form one of the most diverse terrestrial vertebrate orders: A wiseGEEK: Definition of Passerine: perching birds mostly small and living near the ground with feet having 4 toes arranged to allow for gripping the perch; most are songbirds; hatchlings are helpless Mae GyrA yn dweud golfanaidd (ans) neu golfan (enw). Oes enw penodol yn cael ei ddefnyddio am "woodland passerines"? adar clwydo'r coetiroedd? adar sy'n clwydo mewn coetiroedd? Diolch Siân