DRYMARCHON MELANURUS PDF

The Middle American indigo snake Drymarchon melanurus , also known commonly as the blacktail cribo , is a species of large, non venomous , snake in the family Colubridae. In addition to the nominotypical subspecies , it has four other recognized subspecies , including D. This species has predominantly olive-brown glossy dorsal scales evolving to black at the tail. The underside is a lighter olive-yellow, olive-tan color.

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Drymarchon melanurus erebennus , commonly known as the Texas Indigo Snake , is a subspecies of large, nonvenomous snake in the family Colubridae. The subspecies is native to Texas and adjacent Mexico. Dorsally , the Texas indigo snake is predominantly black in color, with a high sheen which gives its smooth scales a remarkable iridescent hue. The underside is often a salmon pink color. The Texas indigo snake prefers lightly vegetated areas not far from permanent water sources, but is also found in mesquite savannah , open grassland areas, and coastal sand dunes.

It dens in burrows left by other animals. It will consume almost anything it can overpower and swallow, including mammals , birds , lizards , frogs , turtles , eggs , and even other snakes , including rattlesnakes. Because of its aggressive attacks on rattlesnakes, many farmers in southern Texas consider it a useful ally. Like many colubrid snakes, it will often shake its tail as a warning — even though it does not possess a rattle.

Breeding of D. Clutches that average eggs are laid in the spring, and hatch around 80 days later. Maturity is reached in 2—3 years. The Texas indigo snake is listed as a threatened species by the state of Texas.

Each snake requires a large home range to forage, and urban sprawl is shrinking its usable habitat. Roads bisect its territory, and many snakes each year are run over by cars.

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Unsourced material may be challenged and removed. Cope , Texas snakes: identification, distribution, and natural history. University of Texas Press. Texas Tech University. Archived from the original on Retrieved Rio Grande Valleys. Hidden categories: Articles needing additional references from May All articles needing additional references Articles with 'species' microformats Commons category link from Wikidata.

Namespaces Article Talk. Views Read Edit View history. Contribute Help Community portal Recent changes Upload file. Languages Add links. In other projects Wikimedia Commons. By using this site, you agree to the Terms of Use and Privacy Policy. Drymarchon melanurus erebennus Cope , Wikimedia Commons has media related to Drymarchon melanurus erebennus. Wikispecies has information related to Drymarchon melanurus erebennus.

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Go to: main text of page main navigation local menu. Additionally, juveniles and some adults of erebennus, rubidus and unicolor display oblique dark bars on the sides of the neck, which appear to be homologous with the marks seen in D. Although the sister taxon to Drymarchon is unresolved, these dark marks appear to be unique to these taxa, and can therefore be regarded as a synapomorphy for these populations. Adult D. Additionally, this subspecies usu- ally has 14 dorsal scale rows anterior to the vent. Doan, pers.

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Middle American indigo snake

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