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Southwestern Blackhead Snake vs. Flat-headed Snake

iNaturalist observation maps: they meet in west-central Texas. A: A sharp black cap on the head in the Southwestern Blackhead Snake; the head only a little darker than the body; no sharp cap in the Flat-headed Snake. Both have a pink or salmon belly; the Flat-headed Snake's has no edged red stripe.

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Southwestern Blackhead Snake

Tantilla hobartsmithi

Flat-headed Snake

Tantilla gracilis
Southwestern Blackhead Snake vs. Flat-headed Snake: comparison sheet with the differences marked

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

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