Pygmy Rattlesnake vs. Prairie Rattlesnake
The owner asked for every overlapping rattler. They barely meet: the Prairie Rattlesnake lives in the shortgrass of the Oklahoma Panhandle and the far west, the Pygmy in the wooded east (records share 2 one-degree squares, in Texas). A: Small, round dark blotches spaced apart, a rust-red stripe between them in the Pygmy Rattlesnake; large brown blotches, each edged with a thin pale line in the Prairie Rattlesnake. B: Plain, with a tiny, thin rattle in the Pygmy Rattlesnake; brown rings before a big rattle in the Prairie Rattlesnake. The Pygmy has nine big plates on top of the head, the Prairie many small scales. Both are venomous: watch from a distance.
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Photographs via iNaturalist under Creative Commons licences; the photographers are credited on the sheet.
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