18. Eagle Owl (Bubo bubo) = Eurasian eagle-owl (Bubo bubo)
19. Tawny Owl (Syrnium aluco) = Tawny owl (Strix aluco)
20. European Long-eared Owl (Asio otus) = Long-eared owl (Asio otus)
21. Barn Owl (Strix fiammea) = Barn owl (Tyto alba)
22. Little Owl (Athene noctua) = Little owl (Athene noctua)
23. Snowy owl (Nyctea nyctea) = Snowy owl (Bubo scandiacus)

Date 1909
Source http://www.flickr.com/photos/biodivlibrary/7971255648
Author Ella Hardcastle; Charles Robert Knight
Full title Birds of the world for young people,
Source: https://commons.wikimedia.org/wiki/File:Birds_of_the_world_for_young_people_(Pl._5)_(7971255648).jpg

The Eurasian eagle-owl (Bubo bubo) is a species of eagle-owl that resides in much of Eurasia. It is also called the European eagle-owl and in Europe it is occasionally abbreviated to just eagle-owl.

The tawny owl or brown owl (Strix aluco) is a stocky, medium-sized owl commonly found in woodlands across much of Eurasia. Its underparts are pale with dark streaks, and the upperparts are either brown or grey.

The long-eared owl (Asio otus, previously Strix otus) is a species of owl which breeds in Europe, Asia, and North America. This species is a part of the larger grouping of owls known as typical owls, family Strigidae.

The barn owl (Tyto alba) is the most widely distributed species of owl and one of the most widespread of all birds. It is also referred to as the common barn owl, to distinguish it from other species in its family, Tytonidae.

The little owl (Athene noctua) is a bird that inhabits much of the temperate and warmer parts of Europe, Asia east to Korea, and north Africa. This owl is a member of the typical or true owl family, Strigidae.

The snowy owl (Bubo scandiacus) is a large, white owl of the typical owl family. Snowy owls are native to Arctic regions in North America and Eurasia.