in Phalaropus, [278];

larger than male in Apteryx, [33];

in Cassowaries, [33];

in Emeus, [33];

in Falconiformes, [137]

Femur, [8], [9]

Fenestrae, [8]

Fern-Owl, [418]

Festooned bill, [12]

Fibula, [8], [9]