C.A. Checklist

Scientific Name

Balsas Screech-Owl - M. seductus
Bare-shanked Screech-Owl - M. clarkii
Barn Owl - T. alba
Barred Owl - S. varia
Bearded Screech-Owl - M. barbarus
Black-and-White Owl - C. nigrolineata
Burrowing Owl - A. cunicularia
Cape Pygmy-Owl - G. hoskinsii
Central American Pygmy-Owl - G. griseiceps
Colima (Least) Pygmy-Owl - G. palmarum
Costa Rican Pygmy-Owl - G. costaricanum
Crested Owl - L. cristata
Eastern Screech-Owl - M. asio
Elf Owl - M. whitneyi
Ferruginous Pygmy-Owl - G. brasilianum
Flammulated Owl - O. flammeolus
Fulvous Owl - S. fulvescens
Great Horned Owl - B. virginianus
Guatemalan Screech-Owl - M. guatemalae
Long-eared Owl - A. otus
Mottled Owl - C. virgata
Mountain Pygmy-Owl - G. gnoma
Northern Saw-whet Owl - A. acadicus
Pacific Screech-Owl - M. cooperi
Short-eared Owl - A. flammeus
Spectacled Owl - P. perspicillata
Spotted Owl - S. occidentalis
Striped Owl - A. clamator
Stygian Owl - A. stygius
Tamaulipas Pygmy-Owl - G. sanchezi
Tropical Screech-Owl - M. choliba
Unspotted Saw-whet Owl - A. ridgwayi
Vermiculated Screech-Owl - M. vermiculatus
Western Screech-Owl - M. kennicottii
Whiskered Screech-Owl - M. trichopsis

Aegolius acadicus - Northern Saw-whet Owl
Aegolius ridgwayi - Unspotted Saw-whet Owl
Asio clamator - Striped Owl
Asio flammeus - Short-eared Owl
Asio otus - Long-eared Owl
Asio stygius - Stygian Owl
Athene cunicularia - Burrowing Owl
Bubo virginianus - Great Horned Owl
Ciccaba (Strix) nigrolineata - Black-and-White Owl
Ciccaba (Strix) virgata - Mottled Owl
Glaucidium brasilianum - Ferruginous Pygmy-Owl
Glaucidium costaricanum - Costa Rican Pygmy-Owl
Glaucidium gnoma - Mountain Pygmy-Owl
Glaucidium griseiceps - Central American Pygmy-Owl
Glaucidium hoskinsii - Cape Pygmy-Owl
Glaucidium palmarum - Colima (Least) Pygmy-Owl
Glaucidium sanchezi - Tamaulipas Pygmy-Owl
Lophostrix cristata - Crested Owl
Micrathene whitneyi - Elf Owl
Megascops (Otus) asio - Eastern Screech-Owl
Megascops (Otus) barbarus - Bearded Screech-Owl
Megascops (Otus) choliba - Tropical Screech-Owl
Megascops (Otus) clarkii - Bare-shanked Screech-Owl
Megascops (Otus) cooperi - Pacific Screech-Owl
Megascops (Otus) guatemalae - Guatemalan Screech-Owl
Megascops (Otus) vermiculatus - Vermiculated Screech-Owl
Megascops (Otus) kennicottii - Western Screech-Owl
Megascops (Otus) seductus - Balsas Screech-Owl
Megascops (Otus) trichopsis - Whiskered Screech-Owl
Otus flammeolus - Flammulated Owl
Pulsatrix perspicillata - Spectacled Owl
Strix fulvescens - Fulvous Owl
Strix occidentalis - Spotted Owl
Strix varia - Barred Owl
Tyto alba - Barn Owl

Taxonomic

Size (largest to smallest)

Tyto alba - Barn Owl
Otus flammeolus - Flammulated Owl
Megascops (Otus) kennicottii - Western Screech-Owl
Megascops (Otus) asio - Eastern Screech-Owl
Megascops (Otus) seductus - Balsas Screech-Owl
Megascops (Otus) cooperi - Pacific Screech-Owl
Megascops (Otus) trichopsis - Whiskered Screech-Owl
Megascops (Otus) choliba - Tropical Screech-Owl
Megascops (Otus) barbarus - Bearded Screech-Owl
Megascops (Otus) guatemalae - Guatemalan Screech-Owl
Megascops (Otus) vermiculatus - Vermiculated Screech-Owl
Megascops (Otus) clarkii - Bare-shanked Screech-Owl
Lophostrix cristata - Crested Owl
Pulsatrix perspicillata - Spectacled Owl
Bubo virginianus - Great Horned Owl
Glaucidium gnoma - Mountain Pygmy-Owl
Glaucidium hoskinsii - Cape Pygmy-Owl
Glaucidium costaricanum - Costa Rican Pygmy-Owl
Glaucidium griseiceps - Central American Pygmy-Owl
Glaucidium sanchezi - Tamaulipas Pygmy-Owl
Glaucidium palmarum - Colima (Least) Pygmy-Owl
Glaucidium brasilianum - Ferruginous Pygmy-Owl
Micrathene whitneyi - Elf Owl
Athene cunicularia - Burrowing Owl
Ciccaba (Strix) virgata - Mottled Owl
Ciccaba (Strix) nigrolineata - Black-and-White Owl
Strix occidentalis - Spotted Owl
Strix varia - Barred Owl
Strix fulvescens - Fulvous Owl
Asio otus - Long-eared Owl
Asio stygius - Stygian Owl
Asio flammeus - Short-eared Owl
Asio clamator - Striped Owl
Aegolius acadicus - Northern Saw-whet Owl
Aegolius ridgwayi - Unspotted Saw-whet Owl

Great Horned Owl - B. virginianus (19-25 in.)
Barred Owl - S. varia (19-21 in.)
Spectacled Owl - P. perspicillata (17-19 in.)
Spotted Owl - S. occidentalis (17-19 in.)
Crested Owl - L. cristata (15-17 in.)
Stygian Owl - A. stygius (15-17 in.)
Short-eared Owl - A. flammeus (15-16 in.)
Fulvous Owl - S. fulvescens (15-16 in.)
Black-and-White Owl - C. nigrolineata (14-16 in.)
Barn Owl - T. alba (14-16 in.)
Long-eared Owl - A. otus (13-16 in.)
Mottled Owl - C. virgata (13-15 in.)
Striped Owl - A. clamator (13-15 in.)
Balsas Screech-Owl - M. seductus (9.5-10.5 in.)
Burrowing Owl - A. cunicularia (9-10 in.)
Pacific Screech-Owl - M. cooperi (9-10 in.)
Bare-shanked Screech-Owl - M. clarkii (8-10 in.)
Tropical Screech-Owl - M. choliba (8-9.5 in.)
Guatemalan Screech-Owl - M. guatemalae (8-9in.)
Vermiculated Screech-Owl - M. vermiculatus (8-9in.)
Unspotted Saw-whet Owl - A. ridgwayi (8-8.5 in.)
Northern Saw-whet Owl - A. acadicus (7-8.5 in.)
Western Screech-Owl - M. kennicottii (8.25-9.5)
Eastern Screech-Owl - M. asio (8-9 in.)
Bearded Screech-Owl - M. barbarus (6.5-7.5 in.)
Whiskered Screech-Owl - M. trichopsis (6.5-7.5 in.)
Ferruginous Pygmy-Owl - G. brasilianum (6.5-7 in.)
Cape Pygmy-Owl - G. hoskinsii (6-6.5 in.)
Costa Rican Pygmy-Owl - G. costaricanum (6 in.)
Flammulated Owl - O. flammeolus (5.9-6.7 in.)
Mountain Pygmy-Owl - G. gnoma (5.9-6.5 in.)
Central American Pygmy-Owl - G. griseiceps (5.5-6 in.)
Tamaulipas Pygmy-Owl - G. sanchezi (5.5-6 in.)
Colima Pygmy-Owl - G. palmarum (5.5-6 in.)
Elf Owl - M. whitneyi (5.1-5.5 in.)