Members of the family have long, broad wings with 11 primary feathers and about 20 secondaries. They are strong fliers and, rather surprisingly, given their size and weight, very capable soarers. The body tends to be elongated, the neck more so, with rather long legs. The bill is also long, decurved in the case of the ibises, straight and distinctively flattened in the spoonbills. They are large birds, but mid-sized by the standards of their order, ranging from the dwarf olive ibis (Bostrychia bocagei), at 45 cm (18 in) and 450 g (0.99 lb), to the giant ibis (Thaumatibis gigantea), at 100 cm (39 in) and 4.2 kg (9.3 lb).