Showing below up to 50 results in range #19,451 to #19,500.
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- Oriolus xanthonotus → Dark-throated Oriole
- Oriolus xanthornus → Black-hooded Oriole
- Oristano (Sardinia) → Oristano
- Oristano Sardinia, Italy → Oristano
- Oriturus → Category:Oriturus
- Oriturus superciliosus → Striped Sparrow
- Orkney → Category:Orkney Islands
- Orkney Islands → Category:Orkney Islands
- Orkneys → Category:Orkney Islands
- Ormtjernkampen National Park Norway → Ormtjernkampen National Park
- Ornate Antwren → Ornate Stipplethroat
- Ornate Fruit-Dove → Ornate Fruit Dove
- Ornate Hawk Eagle → Ornate Hawk-Eagle
- Ornithion → Category:Ornithion
- Ornithion brunneicapillus → Brown-capped Tyrannulet
- Ornithion inerme → White-lored Tyrannulet
- Ornithion semiflavum → Yellow-bellied Tyrannulet
- Ornorectes → Category:Ornorectes
- Ornorectes cristatus → Piping Bellbird
- Oroaetus → Category:Oroaetus
- Oroaetus isidori → Black-and-chestnut Eagle
- Orochelidon → Category:Orochelidon
- Orochelidon andecola → Andean Swallow
- Orochelidon flavipes → Pale-footed Swallow
- Orochelidon murina → Brown-bellied Swallow
- Ortalis → Category:Ortalis
- Ortalis araucuan → East Brazilian Chachalaca
- Ortalis canicollis → Chaco Chachalaca
- Ortalis cinereiceps → Gray-headed Chachalaca
- Ortalis columbiana → Colombian Chachalaca
- Ortalis erythroptera → Rufous-headed Chachalaca
- Ortalis garrula → Chestnut-winged Chachalaca
- Ortalis guttata → Speckled Chachalaca
- Ortalis leucogastra → White-bellied Chachalaca
- Ortalis motmot → Variable Chachalaca
- Ortalis poliocephala → West Mexican Chachalaca
- Ortalis ruficauda → Rufous-vented Chachalaca
- Ortalis ruficeps → Variable Chachalaca
- Ortalis squamata → Scaled Chachalaca
- Ortalis superciliaris → Buff-browed Chachalaca
- Ortalis vetula → Plain Chachalaca
- Ortalis wagleri → Rufous-bellied Chachalaca
- Ortazzo and surrounding area Italy → Ortazzo and surrounding area
- Orthogonys → Category:Orthogonys
- Orthogonys chloricterus → Olive-green Tanager
- Orthonychidae → Category:Orthonychidae
- Orthonyx → Category:Orthonyx
- Orthonyx novaeguineae → Papuan Logrunner
- Orthonyx spaldingii → Chowchilla
- Orthonyx temminckii → Australian Logrunner


