Eastern Coral Snake

Venomous

Eastern Coral Snake

(Micrurus fulvius)

(Linnaeus, 1766)

NOTE: Eastern Coral Snake bites are medical emergencies that require immediate medical care. Go to the nearest Emergency Room immediately !!!

Genus 

Micrurus

Species

fulvius

Subspecies

N/A

Common Name

Eastern Coral Snake

Other Names

Harlequin Snake

Conservation

Status

Alabama Highest Conservation Concern: P1

 

Taxa critically imperiled and at risk of extinction/extirpation because of extreme rarity, restricted distribution, decreasing population trend/population viability problems, and specialized habitat needs/habitat vulnerability due to natural/human-caused factors. Immediate research and/or conservation action required

Taxon

Micrurus fulvius — WALLACH et al. 2014: 447

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Description:

The Eastern Coral Snake adults can range from 24-48 inches in length with a record length of 51 inches (Roze, 1996) has red, yellow, and black bands that encircle the body across the belly, with the black, and red bands separated by smaller yellow bands. Black spots can commonly be seen in the red bands, most notably on the venter. They have a black nose with that black always covering their little black eyes (you can not see their round black pupils). The red, yellow, black theme changes to only black and yellow bands at the tail. Aberrant individuals – in pattern and color are known but uncommon. 

  Scale distinction:  Smooth scales in 15 dorsal scale rows. A divided anal plate. Divided subcaudal scales. The ventral scales number 197-217 in males and 219–233 in females. There are 40–47 subcaudals in males and 30–37 in females  

Habitat:

  Northernmost range prefers habitat with dry open ground, bushy but not heavily vegetated sandy soils in hardwood forests to pine flatwoods. In the southern range they’re known to favor areas close to lake beds. Spends most of its time buried in loose soil, leaflitter, logs and stumps. Primarily diurnal early morning and late evening. 

Distribution:

  Found in southeast United States. Southeast North Carolina south through parts of South Carolina throughout Florida across south Georgia, south Alabama, south Mississippi, and southeast Louisiana east of the Mississippi River. In Alabama were once considered common across the coastal plains. Northern limits in Alabama aren’t clearly defined. Eastern Coral Snakes have been found in disjunct locations as far as Bibb, Talladega, and Coosa Counties. Yarrow and Holt published records from 1882 and 1924 from Green and Autauga counties but haven’t been observed since. 

Feeding Habits:

  Feeds on lizards, frogs, and smaller snakes. The Coral Snake generally bites and holds the prey and will continually bite and chew their prey as they swallow it. Likely where the myth that Coral Snakes having to chew to envenomate originated. 

Breeding:

   Mating occurs in spring and fall resulting in 2-13 elongate eggs laid under loose soil, leaflitter in May or June. After incubating 70-90 days neonates are hatched 7-9 inches in length and double in size within 2 years. 

Ecology:

 Eastern Coral Snakes are infrequently encountered due to their secretive habits. In Alabama there are generally less than a half dozen sightings reported annually. Coral Snakes are reluctant to bite, however can bite quickly and has highly toxic venom. For these reasons Coral Snakes should only be handled by professionals. 

Status:

  Across their range Eastern Coral Snakes are stable. In Alabama very little is known about Coral Snake ecology. Populations are likely more abundant than thought due to their secretive nature, however there is a notable decline in populations. Evident in how frequently they have been observed in the past. Habitat destruction and invasive Fire Ants are presumed most responsible for their threatened status. 

220-2-.92 Nongame Species Regulation

(1) It shall be unlawful to take, capture, kill, or attempt to take, capture or kill; possess, sell, trade for anything of monetary value, or offer to sell or trade for anything of monetary value, the following nongame wildlife species (or any parts or reproductive products of such species) without a scientific collection permit or written permit from the Commissioner, Department of Conservation and Natural Resources, which shall specifically state what the permittee may do with regard to said species: Eastern Coral Snake (Micrurus fulvius)

Venom Profile:

The venom of M. fulvius is a potent neurotoxin with a median LD50 of 1.3 mg/kg SC. Envenomation causes rapid paralysis and respiratory failure in prey. In humans, symptoms include droopy eye lids (Ptosis), slurred speech, double vision, and muscular paralysis eventually leading to respiratory failure. Observations show venom to be slow acting on ectothermic prey.

 Antivenom 

Wyeth Pharmaceutical stopped producing the antivenom in 2003. All of the 2003 antivenom lots expired in 2008. As supplies dwindled, the FDA tested and extended Wyeth Coral Snake antivenom lot # 4030026 for use until Oct 31st of 2009. Wyeth Pharmaceutical was purchased by Pfizer in 2009 and Pfizer sought FDA approval to extend lot #4030026 each year until October 31st of 2012. This lot number, while quite effective for envenomation treatment, was running low. On December 7, 2012, Pfizer sent out a letter to the North American Health Care Providers (Hospitals) extending a second lot #4030024 (that also expired on October 31, 2008) until April 2014. Pfizer started redistribution of a new lot of Coral Snake antivenom 2019 and is currently available. 

Venom is collected for Pfizer for the production of antivenom from only 3 facilities in Florida. George VanHorn director of Biotoxins Venom Lab/Reptile World Serpentarium St. Cloud Fl. , Jack Facente director of Agritoxins Labs St. Cloud Fl. , and Carl Barden director of Medtoxin venom laboratories/Reptile Discovery Center

Snakes commonly mistaken for Eastern Coral Snakes. How they are similar and how they are different.

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