. . . . . . . . . "Gasterosteus aculeatus" . . "Euphagus cyanocephalus" . . "David Sacerdote. 2017. Gasterosteus aculeatus eaten by Euphagus cyanocephalus. iNaturalist.org. Accessed at <https://www.inaturalist.org/observations/9247190> on 05 Apr 2018." . . . . "http://iNaturalist.org is a place where you can record what you see in nature, meet other nature lovers, and learn about the natural world." .