"Hooded Crow cleans rain gutter [Free footage]". "The Nature Box" (https://www.youtube.com/user/TheNatureBox & https://plus.google.com/111027624205835591649 ) (May 1, 2014). Retrieved on 2014-06-13.Falsely marked as "Standard YouTube License".
"Hooded Crow cleans rain gutter [Free footage]". http://www.looles.com. Retrieved on 2014-06-13.No licence, source & author info added at all, also mirrored on loolex.com.