The following categories exist on the wiki, and may or may not be unused. Also see wanted categories.
(first | last) View (previous 250 | next 250) (20 | 50 | 100 | 250 | 500)- Xiphocolaptes (4 members)
- Xipholena (3 members)
- Xiphorhynchus (13 members)
- Xolmis (2 members)
- Yemen (1 member)
- Yorkshire (23 members)
- Yugoslavia (0 members)
- Yuhina (10 members)
- Yukon Territory (0 members)
- Yungipicus (7 members)
- Zambia (0 members)
- Zanclostomus (1 member)
- Zanda (3 members)
- Zapornia (13 members)
- Zaratornis (1 member)
- Zarhynchus (0 members)
- Zavattariornis (1 member)
- Zebrilus (1 member)
- Zeledonia (1 member)
- Zeledoniidae (1 member)
- Zenaida (7 members)
- Zentrygon (8 members)
- Zimbabwe (0 members)
- Zimmerius (13 members)
- Zonerodius (1 member)
- Zonibyx (1 member)
- Zonotrichia (5 members)
- Zoonavena (3 members)
- Zoothera (21 members)
- Zosteropidae (14 members)
- Zosterops (106 members)
- Zosterornis (5 members)