| Ypresiglaux Temporal range: early Eocene,
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| Holotype fossil elements of Y. michaeldanielsi | |
Scientific classification 
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| Domain: | Eukaryota |
| Kingdom: | Animalia |
| Phylum: | Chordata |
| Class: | Aves |
| Order: | Strigiformes |
| Genus: | †Ypresiglaux Mayr & Kitchener, 2022 |
| Type species | |
| †Ypresiglaux michaeldanielsi Mayr & Kitchener, 2022
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| Other species | |
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| Synonyms | |
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Ypresiglaux (meaning "Ypresian owl") is an extinct genus of strigiform bird from the Early Eocene London Clay Formation of Essex, United Kingdom and Nanjemoy Formation of Virginia, United States. The genus contains two species: Y. michaeldanielsi, known from a partial skeleton, and Y. gulottai, known from a distal tarsometatarsus.[1]
- ^ Mayr, Gerald; Kitchener, Andrew C. (2022). "Early Eocene fossil illuminates the ancestral (diurnal) ecomorphology of owls and documents a mosaic evolution of the strigiform body plan". Ibis. 165: 231–247. doi:10.1111/ibi.13125. ISSN 0019-1019. S2CID 251455832.