| Papuan Hawk-Owl Uroglaux dimorpha Link to the stamps |
| Laughing Owl Ninox albifacies † Link to the stamps |
| Rufous Owl Ninox rufa Link to the stamps |
| Powerful Owl Ninox strenua Link to the stamps |
| Barking Owl Ninox connivens Link to the stamps |
| Australian Boobook Ninox boobook Link to the stamps |
| Tasmanian Boobook Ninox leucopsis Link to the stamps |
| Morepork Ninox novaeseelandiae Link to the stamps |
| Northern Boobook Ninox japonica Link to the stamps |
| Andaman Boobook Ninox affinis Link to the stamps |
| Luzon Boobook Ninox philippensis Link to the stamps |
| Christmas Boobook Ninox natalis Link to the stamps |
| Papuan Boobook Ninox theomacha Link to the stamps |
| Bare-legged Owl Margarobyas lawrencii Link to the stamps |
| Collared Owlet Taenioptynx brodiei Link to the stamps |
| Elf Owl Micrathene whitneyi Link to the stamps |
| Long-whiskered Owlet Xenoglaux loweryi Link to the stamps |
| Boreal Owl Aegolius funereus Link to the stamps |
| Northern Saw-whet Owl Aegolius acadicus Link to the stamps |
| Buff-fronted Owl Aegolius harrisii Link to the stamps |
| White-browed Owl Athene superciliaris Link to the stamps |
| Burrowing Owl Athene cunicularia Link to the stamps |
| Little Owl Athene noctua |
| Spotted Owlet Athene brama Link to the stamps |
| West Solomons Owl Athene jacquinoti Link to the stamps |
| Guadalcanal Owl Athene granti Link to the stamps |
| Northern Hawk-Owl Surnia ulula Link to the stamps |
| Eurasian Pygmy Owl Glaucidium passerinum Link to the stamps |
| Pearl-spotted Owlet Glaucidium perlatum Link to the stamps |
| Red-chested Owlet Glaucidium tephronotum Link to the stamps |
| Sjöstedt's Barred Owlet Glaucidium sjostedti Link to the stamps |
| Asian Barred Owlet Glaucidium cuculoides Link to the stamps |
| Jungle Owlet Glaucidium radiatum Link to the stamps |
| Chestnut-backed Owlet Glaucidium castanotum Link to the stamps |
| Chestnut Owlet Glaucidium castaneum Link to the stamps |
| African Barred Owlet Glaucidium capense Link to the stamps |
| Albertine Owlet Glaucidium albertinum Link to the stamps |
| Northern Pygmy Owl Glaucidium californicum Link to the stamps |
| Mountain Pygmy Owl Glaucidium gnoma Link to the stamps |
| Costa Rican Pygmy Owl Glaucidium costaricanum Link to the stamps |
| Cloud-forest Pygmy Owl Glaucidium nubicola Link to the stamps |
| Andean Pygmy Owl Glaucidium jardinii Link to the stamps |
| Central American Pygmy Owl Glaucidium griseiceps Link to the stamps |
| Amazonian Pygmy Owl Glaucidium hardyi Link to the stamps |
| Ferruginous Pygmy Owl Glaucidium brasilianum Link to the stamps |
| Pacific Pygmy Owl Glaucidium peruanum Link to the stamps |
| Austral Pygmy Owl Glaucidium nana Link to the stamps |
| Cuban Pygmy Owl Glaucidium siju Link to the stamps |
| Giant Scops Owl Otus gurneyi Link to the stamps |
| White-fronted Scops Owl Otus sagittatus Link to the stamps |
| Serendib Scops Owl Otus thilohoffmanni Link to the stamps |
| Sandy Scops Owl Otus icterorhynchus Link to the stamps |
| Sokoke Scops Owl Otus ireneae Link to the stamps |
| Andaman Scops Owl Otus balli Link to the stamps |
| Flores Scops Owl Otus alfredi Link to the stamps |
| Mountain Scops Owl Otus spilocephalus Link to the stamps |
| Luzon Scops Owl Otus longicornis Link to the stamps |
| Rainforest Scops Owl Otus rutilus Link to the stamps |
| Karthala Scops Owl Otus pauliani Link to the stamps |
| Anjouan Scops Owl Otus capnodes Link to the stamps |
| Rodrigues Scops Owl Otus murivorus † Link to the stamps |
| Pallid Scops Owl Otus brucei Link to the stamps |
| Eurasian Scops Owl Otus scops Link to the stamps |
| Cyprus Scops Owl Otus cyprius Link to the stamps |
| Pemba Scops Owl Otus pembaensis Link to the stamps |
| Sao Tome Scops Owl Otus hartlaubi Link to the stamps |
| African Scops Owl Otus senegalensis Link to the stamps |
| Oriental Scops Owl Otus sunia Link to the stamps |
| Ryukyu Scops Owl Otus elegans Link to the stamps |
| Siau Scops Owl Otus siaoensis Link to the stamps |
| Seychelles Scops Owl Otus insularis Link to the stamps |
| Indian Scops Owl Otus bakkamoena Link to the stamps |
| Collared Scops Owl Otus lettia Link to the stamps |
| Japanese Scops Owl Otus semitorques Link to the stamps |
| Philippine Scops Owl Otus megalotis Link to the stamps |
| Negros Scops Owl Otus nigrorum Link to the stamps |
| Palau Owl Otus podarginus Link to the stamps |
| Northern White-faced Owl Ptilopsis leucotis Link to the stamps |
| Southern White-faced Owl Ptilopsis granti Link to the stamps |
| Jamaican Owl Asio grammicus Link to the stamps |
| Striped Owl Asio clamator Link to the stamps |
| Long-eared Owl Asio otus Link to the stamps |
| Abyssinian Owl Asio abyssinicus Link to the stamps |
| Madagascar Owl Asio madagascariensis Link to the stamps |
| Stygian Owl Asio stygius Link to the stamps |
| Short-eared Owl Asio flammeus Link to the stamps |
| Marsh Owl Asio capensis Link to the stamps |
| Fearful Owl Asio solomonensis Link to the stamps |
| Maned Owl Jubula lettii Link to the stamps |
| Snowy Owl Bubo scandiacus Link to the stamps |
| Great Horned Owl Bubo virginianus Link to the stamps |
| Eurasian Eagle-Owl Bubo bubo Link to the stamps |
| Indian Eagle-Owl Bubo bengalensis Link to the stamps |
| Pharaoh Eagle-Owl Bubo ascalaphus Link to the stamps |
| Cape Eagle-Owl Bubo capensis Link to the stamps |
| Greyish Eagle-Owl Bubo cinerascens Link to the stamps |
| Spotted Eagle-Owl Bubo africanus Link to the stamps |
| Fraser's Eagle-Owl Ketupa poensis Link to the stamps |
| Akun Eagle-Owl Ketupa leucosticta Link to the stamps |
| Verreaux's Eagle-Owl Ketupa lactea Link to the stamps |
| Shelley's Eagle-Owl Ketupa shelleyi Link to the stamps |
| Blakiston's Fish Owl Ketupa blakistoni Link to the stamps |
| Brown Fish Owl Ketupa zeylonensis Link to the stamps |
| Tawny Fish Owl Ketupa flavipes Link to the stamps |
| Buffy Fish Owl Ketupa ketupu Link to the stamps |
| Barred Eagle-Owl Ketupa sumatrana Link to the stamps |
| Spot-bellied Eagle-Owl Ketupa nipalensis Link to the stamps |
| Dusky Eagle-Owl Ketupa coromanda Link to the stamps |
| Philippine Eagle-Owl Ketupa philippensis Link to the stamps |
| Pel's Fishing Owl Scotopelia peli Link to the stamps |
| Rufous Fishing Owl Scotopelia ussheri Link to the stamps |
| Tropical Screech Owl Megascops choliba Link to the stamps |
| Pacific Screech Owl Megascops cooperi Link to the stamps |
| Western Screech Owl Megascops kennicottii Link to the stamps |
| Eastern Screech Owl Megascops asio Link to the stamps |
| Balsas Screech Owl Megascops seductus Link to the stamps |
| Koepcke's Screech Owl Megascops koepckeae Link to the stamps |
| Black-capped Screech Owl Megascops atricapilla Link to the stamps |
| Spectacled Owl Pulsatrix perspicillata Link to the stamps |
| Crested Owl Lophostrix cristata Link to the stamps |
| Spotted Wood Owl Strix seloputo Link to the stamps |
| Mottled Wood Owl Strix ocellata Link to the stamps |
| Brown Wood Owl Strix leptogrammica Link to the stamps |
| Tawny Owl Strix aluco Link to the stamps |
| Desert Owl Strix hadorami Link to the stamps |
| Spotted Owl Strix occidentalis Link to the stamps |
| Barred Owl Strix varia Link to the stamps |
| Fulvous Owl Strix fulvescens Link to the stamps |
| Rufous-legged Owl Strix rufipes Link to the stamps |
| Ural Owl Strix uralensis Link to the stamps |
| Great Grey Owl Strix nebulosa Link to the stamps |
| African Wood Owl Strix woodfordii Link to the stamps |
| Mottled Owl Strix virgata Link to the stamps |
| Black-and-white Owl Strix nigrolineata Link to the stamps |
| Black-banded Owl Strix huhula Link to the stamps |
|