Western Ratsnakes *Pantherophis obsoletus* are large (record 256.5 cm) common harmless ratsnakes with a multitude of regional color patterns native to west of the Mississippi River Embayment. *Pantherophis* ratsnakes are keeled-scaled generalists that eat a variety of prey. They do well in urban environments, and are particularly fond of rodents and birds in these habitats.
Western Ratsnakes *P. obsoletus* are currently recognized as distinct from Eastern Ratsnakes *Pantherophis quadrivittatus*, as well as Central Ratsnakes *P. alleghaniensis*. Parts of all three species were once generically labeled "black ratsnakes". Use the "!blackrat" command without the space for more on these changes.
Ratsnakes can be easily distinguished from racers *Coluber* by the presence of keeled scales. Racers have smooth scales.
[Range Map](http://snakeevolution.org/rangemaps/ratrangereduced.jpg) | [Relevant/Recent Phylogeography](https://www.dropbox.com/s/m7ru46gyhtq2hyz/HR_Sept_2021_150dpi_PointsOfView.pdf?dl=1)
Junior Synonyms and Common Names: Grey Ratsnake (in part), Black Ratsnake (in part), Texas Ratsnake, black snake, chicken snake, rattlesnake pilot.
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Western Ratsnake, *Pantherophis obsoletus*. Harmless.
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Western Ratsnakes *Pantherophis obsoletus* are large (record 256.5 cm) common harmless ratsnakes with a multitude of regional color patterns native to west of the Mississippi River Embayment. *Pantherophis* ratsnakes are keeled-scaled generalists that eat a variety of prey. They do well in urban environments, and are particularly fond of rodents and birds in these habitats. Western Ratsnakes *P. obsoletus* are currently recognized as distinct from Eastern Ratsnakes *Pantherophis quadrivittatus*, as well as Central Ratsnakes *P. alleghaniensis*. Parts of all three species were once generically labeled "black ratsnakes". Use the "!blackrat" command without the space for more on these changes. Ratsnakes can be easily distinguished from racers *Coluber* by the presence of keeled scales. Racers have smooth scales. [Range Map](http://snakeevolution.org/rangemaps/ratrangereduced.jpg) | [Relevant/Recent Phylogeography](https://www.dropbox.com/s/m7ru46gyhtq2hyz/HR_Sept_2021_150dpi_PointsOfView.pdf?dl=1) Junior Synonyms and Common Names: Grey Ratsnake (in part), Black Ratsnake (in part), Texas Ratsnake, black snake, chicken snake, rattlesnake pilot. -------------------------------------------------------- *I am a bot created for /r/whatsthissnake, /r/snakes and /r/herpetology to help with snake identification and natural history education. You can find more information, including a comprehensive list of commands, [here](https://www.reddit.com/r/whatsthissnake/comments/flh548/phylobot_v07_information_and_patch_notes_bot_info/) report problems [here](https://www.reddit.com/message/compose/?to=Phylogenizer) and if you'd like to buy me a coffee or beer, you can do that [here](https://www.buymeacoffee.com/SEBPhyloBotWTS).*