| Double-banded Greytail Xenerpestes minlosi | Passeriformes / Furnariidae | LC |
| Equatorial Greytail Xenerpestes singularis | Passeriformes / Furnariidae | LC |
| New Zealand Rockwren Xenicus gilviventris | Passeriformes / Acanthisittidae | EN |
| Bushwren Xenicus longipes | Passeriformes / Acanthisittidae | EX |
| Angola Cave Chat Xenocopsychus ansorgei | Passeriformes / Muscicapidae | LC |
| Tit-like Dacnis Xenodacnis parina | Passeriformes / Thraupidae | LC |
| Streaked Dacnis Xenodacnis petersi | Passeriformes / Thraupidae | LC |
| Long-whiskered Owlet Xenoglaux loweryi | Strigiformes / Strigidae | VU |
| White-winged Warbler Xenoligea montana | Passeriformes / Phaenicophilidae | VU |
| Udzungwa Forest Partridge Xenoperdix udzungwensis | Galliformes / Phasianidae | EN |
| Black Manakin Xenopipo atronitens | Passeriformes / Pipridae | LC |
| Olive Manakin Xenopipo uniformis | Passeriformes / Pipridae | LC |
| Van Dam's Vanga Xenopirostris damii | Passeriformes / Vangidae | EN |
| Pollen's Vanga Xenopirostris polleni | Passeriformes / Vangidae | VU |
| Lafresnaye's Vanga Xenopirostris xenopirostris | Passeriformes / Vangidae | NT |
| Amazonian Plain Xenops Xenops genibarbis | Passeriformes / Furnariidae | NE |
| Northern Plain Xenops Xenops mexicanus | Passeriformes / Furnariidae | NE |
| Atlantic Plain Xenops Xenops minutus | Passeriformes / Furnariidae | LC |
| Streaked Xenops Xenops rutilans | Passeriformes / Furnariidae | LC |
| Slender-billed Xenops Xenops tenuirostris | Passeriformes / Furnariidae | LC |
| White-naped Xenopsaris Xenopsaris albinucha | Passeriformes / Tityridae | LC |
| Speckled Antshrike Xenornis setifrons | Passeriformes / Thamnophilidae | NT |
| Slender-billed Finch Xenospingus concolor | Passeriformes / Thraupidae | NT |
| Sierra Madre Sparrow Xenospiza baileyi | Passeriformes / Passerellidae | EN |
| Belted Flycatcher Xenotriccus callizonus | Passeriformes / Tyrannidae | LC |
| Pileated Flycatcher Xenotriccus mexicanus | Passeriformes / Tyrannidae | LC |
| Cuban Green Woodpecker Xiphidiopicus percussus | Piciformes / Picidae | LC |
| White-throated Woodcreeper Xiphocolaptes albicollis | Passeriformes / Furnariidae | LC |
| Moustached Woodcreeper Xiphocolaptes falcirostris | Passeriformes / Furnariidae | VU |
| Great Rufous Woodcreeper Xiphocolaptes major | Passeriformes / Furnariidae | LC |
| Strong-billed Woodcreeper Xiphocolaptes promeropirhynchus | Passeriformes / Furnariidae | LC |
| White-winged Cotinga Xipholena atropurpurea | Passeriformes / Cotingidae | VU |
| White-tailed Cotinga Xipholena lamellipennis | Passeriformes / Cotingidae | NT |
| Pompadour Cotinga Xipholena punicea | Passeriformes / Cotingidae | LC |
| Ceara Woodcreeper Xiphorhynchus atlanticus | Passeriformes / Furnariidae | VU |
| Elegant Woodcreeper Xiphorhynchus elegans | Passeriformes / Furnariidae | LC |
| Spotted Woodcreeper Xiphorhynchus erythropygius | Passeriformes / Furnariidae | NE |
| Ivory-billed Woodcreeper Xiphorhynchus flavigaster | Passeriformes / Furnariidae | LC |
| Lesser Woodcreeper Xiphorhynchus fuscus | Passeriformes / Furnariidae | LC |
| Buff-throated Woodcreeper Xiphorhynchus guttatus | Passeriformes / Furnariidae | NE |
| Black-striped Woodcreeper Xiphorhynchus lachrymosus | Passeriformes / Furnariidae | LC |
| Striped Woodcreeper Xiphorhynchus obsoletus | Passeriformes / Furnariidae | LC |
| Ocellated Woodcreeper Xiphorhynchus ocellatus | Passeriformes / Furnariidae | NE |
| Chestnut-rumped Woodcreeper Xiphorhynchus pardalotus | Passeriformes / Furnariidae | LC |
| Spix's Woodcreeper Xiphorhynchus spixii | Passeriformes / Furnariidae | LC |
| Cocoa Woodcreeper Xiphorhynchus susurrans | Passeriformes / Furnariidae | LC |
| Olive-backed Woodcreeper Xiphorhynchus triangularis | Passeriformes / Furnariidae | LC |
| White Monjita Xolmis irupero | Passeriformes / Tyrannidae | LC |
| White-rumped Monjita Xolmis velatus | Passeriformes / Tyrannidae | LC |
| Burmese Yuhina Yuhina humilis | Passeriformes / Zosteropidae | LC |