Surnia

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Northern Hawk Owl (Surnia ululaby Steen Viggo Jørgensen

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As you probably know all Fukurodani members have something owly in their names (and sometimes in character design too lol).
So:
Bokuto is Horned Owl. I vote for a Great Horned Owl (Bubo virginianus subarcticus);
Akaashi is Rufous-legged Owl (Strix rufipes);
Konoha is Eurasian Scops Owl is Konohazuku (Otus scops);
Shirofuku is Snowy Owl (Bubo scandiacus)
Suzumeda is some kind of Pygmy Owl;
Komi is Short-eared Owl (Asio flammeus);
Sarukui is Verreaux’s Eagle-owl (Bubo lacteus);
Washio is Eurasian Eagle-owl (Bubo Bubo);
Onaga = Northern Hawk-owl (Surnia ulula).

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Northern Hawk Owl (Surnia ulula) >>by Guy Lichte

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Northern Hawk Owl (Surnia ulula)  by Kim Ng

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Northern Hawk Owl by Nis Lundmark Jensen
Via Flickr:
Høgeugle