. . . . . . . . . "Pituophis catenifer" . . "Falco sparverius" . . "Kim Moore. 2017. Pituophis catenifer second associated species with names lookup Falco sparverius. iNaturalist.org. Accessed at <https://www.inaturalist.org/observations/6510294> 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." .