Author 'Boucher Marc dit de Meilh' (Id 101713 ) : Another picture of marabou, this large wader ... The marabouts are very large wading birds in tropical latitudes. These are large birds ranging from 100 to 150 cm with a wingspan of 210 to 250 cm. The marabouts are gregarious, nesting in colonies in moist areas and building large stick nests in trees. They eat frogs, insects, young birds, lizards and rodents ... Photo: Hanmeil.