The following categories exist on the wiki, and may or may not be unused. Also see wanted categories.
(first | last) View (previous 50 | next 50) (20 | 50 | 100 | 250 | 500)- Xanthoura (0 members)
- Xema (1 member)
- Xenerpestes (3 members)
- Xenicus (2 members)
- Xenocopsychus (1 member)
- Xenodacnis (1 member)
- Xenoglaux (1 member)
- Xenoligea (1 member)
- Xenoperdix (1 member)
- Xenopipo (2 members)
- Xenopirostris (3 members)
- Xenops (3 members)
- Xenopsaris (1 member)
- Xenornis (1 member)
- Xenospingus (1 member)
- Xenospiza (1 member)
- Xenotriccus (2 members)
- Xenus (1 member)
- Xiphidiopicus (1 member)
- Xiphirhynchus (0 members)
- 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)