Appearance
Throughout its range, this species is large (to 2527 mm total length) with a long tail (23-36% of the total length).The dorsum in adults is brown, tan, gray, or bluish-gray with no prominent striping. Individual dorsal scales often have dark spots that can suggest narrow linear stripes.
The top of the head may be tan or brown, and the underside of the head and chin ranges from being devoid of markings to heavily mottled, depending on the subspecies.
Juvenile snakes may possess anterior crossbands or longitudinal stripes. Scutellation is as follows: 6-8 supralabials on each side of the head, smooth dorsal scales in 16 or 17 rows at mid-body; 166-205 ventrals; and 95-123 divided subcaudals. The loreal is present.
References:
Some text fragments are auto parsed from Wikipedia.
https://tucsonherpsociety.org/amphibians-reptiles/snakes/neotropical-whipsnake/