Three-Toed Amphiuma Fact File
Amphiuma tridactylum
Weight
Insufficient
Data
Length
0.5-1.1m
(1.5-3.5ft)
Lifespan
Wild Unknown
Captive 13-19 years
Conservation Status
IUCN
Least Concern
Range
North America is the native home of the three-toed amphiuma. Here they can be found in the south-east corner of the country. Their range takes in the following states - Mississippi, Texas, Alabama, Arkansas, Tennessee, Missouri and Kentucky.
Habitat
These amphibians live in marshes, lakes, bayous and streams. Most of their habitats feature areas with heavy vegetation and bodies of slow moving water.
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Reproduction
Mating takes place late in winter. Females court a mate by rubbing her snout against the male. Males and females wrap around one another with the aim of transferring sperm to the female. Unlike the majority of amphibians fertilization is undertaken internally.
Both males and females can mate with multiple partners each breeding season.
In spring the females deposit up to 200 eggs in strings which they then wrap around and protect for the 20 week incubation period. The eggs are opaque in color.
During the incubation the water level often drops and the larvae must make their way over land.
At birth the young are equipped with gills which reabsorb within 10 days of hatching. Their lungs are well developed at hatching and they can already breathe at the water's surface.
Sexual maturity is reached between 3 and 4 years old.
Behavior
Three-toed amphiumas spend the majority of their life in the water.
They are active at night when they will emerge to hunt. During the day they will seek shelter in a burrow within the streambed. They may make use of the burrows of crayfish. When there is heavy rainfall they may leave the water and make a brief trip across land.
During a period of dry weather the three-toed amphiuma will retreat in to a burrow.
The bite of these animals are strong and in some cases have been reported as requiring stitches.
Predators and Threats
Natural predators of the three-toed amphiuma include snakes such as the cottonmouth.
Their main defense against predation is their powerful bite.
These animals are captured for sale in to the pet trade or to be used in laboratory experiments.
While this species has suffered a loss of habitat but this has been offset by the creation of artificial habitats such as canals and ponds.
Quick facts
The three-toed amphiuma has also been referred to as the Congo eel a misleading name for a species found in North America. Other alternative names include the ditch eel and lamp eater.
There are three species of amphiuma with the three-toed amphiuma being the second largest of the three species.
Photo Credits
Top, Middle One and Bottom
Peter Paplanus, CC BY-SA 4.0 <https://creativecommons.org/licenses/by-sa/4.0>, via Wikimedia Commons
Middle Two Left
Lamb, J.Y., Davis, M.P. (2020), CC BY 4.0 <https://creativecommons.org/licenses/by/4.0>, via Wikimedia Commons
Middle Two Right
opencage, CC BY-SA 3.0 <https://creativecommons.org/licenses/by-sa/3.0>, via Wikimedia Commons
References
Burnie, D., 2011. Animal. 3rd ed. London: DK
Jackson, T. and Chinery, M., 2012. The illustrated encyclopedia of animals of the world. London: Southwater.
Bird Kingdom. 2021. Three-Toed Amphiuma. [online] Available at: <https://www.birdkingdom.ca/our_animals/three_toed_amphiuma> [Accessed 30 August 2021].
Kowalski, E. and Watkins-Colwell, G., 2004. Caudata Culture Species Entry - Amphiuma. [online] Caudata.org. Available at: <https://www.caudata.org/cc/species/Amphiuma/Amphiuma.shtml> [Accessed 30 August 2021].
Tn.gov. 2021. Three-toed Amphiuma | Tennessee Wildlife Resources Agency. [online] Available at: <https://www.tn.gov/twra/wildlife/amphibians/salamanders/three-toed-amphiuma.html> [Accessed 30 August 2021].
AmphibiaWeb 2001 Amphiuma tridactylum: Three-toed Amphiuma <https://amphibiaweb.org/species/3855> University of California, Berkeley, CA, USA. Accessed Aug 30, 2021.
Fuller, P., 2021, Amphiuma tridactylum Cuvier, 1827: U.S. Geological Survey, Nonindigenous Aquatic Species Database, Gainesville, FL, https://nas.er.usgs.gov/queries/factsheet.aspx?SpeciesID=2863, Revision Date: 4/17/2019, Access Date: 8/30/2021
Missouri Department of Conservation. 2021. Three-Toed Amphiuma. [online] Available at: <https://mdc.mo.gov/discover-nature/field-guide/three-toed-amphiuma> [Accessed 30 August 2021].
Schnelker, A. 2011. "Amphiuma tridactylum" (On-line), Animal Diversity Web. Accessed August 30, 2021 at https://animaldiversity.org/accounts/Amphiuma_tridactylum/
Geoffrey Hammerson. 2004. Amphiuma tridactylum. The IUCN Red List of Threatened Species 2004: e.T59076A11879742. https://dx.doi.org/10.2305/IUCN.UK.2004.RLTS.T59076A11879742.en. Downloaded on 30 August 2021.
Geoffrey Hammerson. 2004. Amphiuma tridactylum. The IUCN Red List of Threatened Species 2004: e.T59076A11879742. https://dx.doi.org/10.2305/IUCN.UK.2004.RLTS.T59076A11879742.en. Downloaded on 30 August 2021.
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