Ostrich, [389]-92

Ouzel, Water-, [538]

Oven-birds, [543]

Oven-"irds, Casarita, [544]

Owl, Barn-, [480]

O"l, Ba"n-, Virginian, [478]

O"l, Burrowing-, [479]

O"l, Eagle-, [478]-9

O"l, Long-eared, [479]

O"l, Pygmy, [480]