Wildsight
Compare two species

Southwestern Blackhead Snake vs. Plains Black-headed Snake

Out of state: their records overlap in west Texas and New Mexico (review/b2-overlap.js). A: Ends straight across or rounded just behind the head in the Southwestern Blackhead Snake; reaches back in a point 2 to 5 scales past the head in the Plains Black-headed Snake. B: Brown in the Southwestern Blackhead Snake; tan to brown in the Plains Black-headed Snake.

Open this comparison in Wildsight

Southwestern Blackhead Snake

Tantilla hobartsmithi

Plains Black-headed Snake

Tantilla nigriceps
Southwestern Blackhead Snake vs. Plains Black-headed Snake: comparison sheet with the differences marked

Photographs via iNaturalist under Creative Commons licences; the photographers are credited on the sheet.

More comparisons

Wildsight identifies the reptiles and amphibians of the United States. Every comparison