Published in The Wilson Bulletin, in 2003, in volume 115, issue 3, pages 333-336

Created: 2016-12-11, modified: 2016-12-11

Published in Journal of Raptor Research, in 2000, in volume 34, issue 1, pages 37-41

Created: 2017-04-07, modified: 2017-04-07

Published in Forktail, in 2016, in volume 32, pages 86-88

Created: 2019-05-12, modified: 2019-05-12