This is a list of soaringbirds, which are birds that can maintain flight without wing flapping, using rising air currents. Many gliding birds are able to "lock" their extended wings by means of a specialized tendon.[1]
↑Loon, Rael (2005). Sasol Birds - the inside Story. City: NEW HOLLAND PUBLISHED. p.20. ISBN1-77007-151-2.
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