. . . . . . . . . "Picoides nuttallii" . . "Spinus tristis" . . "sciencebabe. 2016. Picoides nuttallii associated species with names lookup Spinus tristis. iNaturalist.org. Accessed at <https://www.inaturalist.org/observations/5600526> 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." .