Overview
Comprehensive Description
Description
Snout-vent lengths range from 42 to 82 mm in males and 44 to 92 mm in females. Dorsal coloration is usually some shade of brown, but varies from red to nearly black. Dark spots often enclosing more than one wart are present. The cranial crests approach each other anteriorly and are posteriorly raised to form clublike knobs. A faint mid-dorsal stripe is frequently present.
A video of Bufo terrestris feeding can be found here.
- Blem, C. R. (1963). ''Bufo terrestris.'' Catalogue of American Amphibians and Reptiles. American Society of Ichthyologists and Herpetologists, 223.1-223.4.
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Distribution
Range Description
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Geographic Range
Anaxyrus terrestris occupies areas from North Carolina to Florida
and west to the Mississippi River. It is commonly found in the
coastal states of the Southeast. Its westernmost range enters
into eastern Louisiana. The northern range extends into
southeastern Virginia (Wright 1949).
Biogeographic Regions: nearctic (Native )
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National Distribution
United States
Origin: Native
Regularity: Regularly occurring
Currently: Present
Confidence: Confident
Type of Residency: Year-round
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Global Range: (200,000-2,500,000 square km (about 80,000-1,000,000 square miles)) Coastal Plain from southeastern Virginia to the Florida Keys, west to Louisiana; disjunct population in Upper Piedmont and Blue Ridge of South Carolina (but not Georgia) (Laerm and Hopkins 1997).
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Distribution and Habitat
- Blem, C. R. (1963). ''Bufo terrestris.'' Catalogue of American Amphibians and Reptiles. American Society of Ichthyologists and Herpetologists, 223.1-223.4.
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Physical Description
Morphology
Physical Description
A. terrestris is a medium-sized toad in which adults of the
species can attain snout vent lengths between 41mm and 92mm.
Males usually average between 42-82mm and females slightly
larger between 44-92mm (Wright 1949). Much larger specimens,
however, have been found on islands along the coasts of Georgia,
Florida, and South Carolina. The most distinguishing
characteristic is the knobs found on the head which are actually
extensions of the interorbital ridges. As usual with a
member of the family Bufonidae, parotoid glands are present and
the skin is warty. The warts are often spine-tipped. The
spotted and mottled dorsal coloration can vary from shades of
brick red to black. The ventral side is lighter. Post orbital
ridges are not in contact with the parotoids but are connected to
them by a backward projecting spur (Mount 1975).
Average mass: 19.267 g.
Average basal metabolic rate: 0.00698 W.
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Size
Type Information
Collection: Smithsonian Institution, National Museum of Natural History, Department of Vertebrate Zoology, Division of Amphibians & Reptiles
Preparation: Ethanol
Locality: Micanopy, Alachua, Florida, United States, North America
- Syntype: Cope, E. D. 1889. United States National Museum Bulletin. (34): 288.
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Ecology
Habitat
Habitat and Ecology
Systems
- Terrestrial
- Freshwater
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Habitat
Inhabits sandy areas, cultivated fields, pine barrens and hammocks (Mount 1975).
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Comments: Adaptable and ubiquitous. Occupies a wide variety of wooded and unwooded habitats, which usually have sandy soil. Burrows underground when inactive. Eggs and larvae develop in shallow water of permanent ponds, woodland pools, and flooded depressions.
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Migration
Non-Migrant: No. All populations of this species make significant seasonal migrations.
Locally Migrant: Yes. At least some populations of this species make local extended movements (generally less than 200 km) at particular times of the year (e.g., to breeding or wintering grounds, to hibernation sites).
Locally Migrant: No. No populations of this species make annual migrations of over 200 km.
Migrates between breeding pools and adjacent nonbreeding terrestrial habitats.
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Trophic Strategy
Food Habits
A. terrestris generally feeds on a variety of insects and
invertebrates (Bullpine Forestry 1999).
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Comments: Metamorphosed toads eat a variety of small terrestrial arthropods. Larvae eat organic debris, algae, and plant tissue.
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Population Biology
Number of Occurrences
Note: For many non-migratory species, occurrences are roughly equivalent to populations.
Estimated Number of Occurrences: > 300
Comments: Represented by many and/or large occurrences throughout most of the range.
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Global Abundance
100,000 - 1,000,000 individuals
Comments: Total adult population size is unknown but likely exceeds 100,000. Common in many areas, despite habitat alteration.
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Life History and Behavior
Cyclicity
Life Expectancy
Lifespan/Longevity
Average lifespan
Status: captivity: 10 years.
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Lifespan, longevity, and ageing
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Reproduction
Reproduction
This species breeds during wet-weather periods from around the
first of March to late May (Mount 1975). However, occasionally
continue on to September (Wright 1949). Breeding usually occurs
on the edges of small permanent ponds, woodland pools, or
flooded depressions. As is the case of closely related Bufo
fowleri, A. terrestris will never breed in creeks or rivers.
The eggs which number between 2500-3000 are laid in long coils
of jelly which hatch within 2-4 days. A. terrestris spends
30-55 days as a tadpole before metamorphasing upon attaining a
length between 6.5-11mm (Wright 1949).
Average time to hatching: 3 days.
Average number of offspring: 2750.
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Lays clutch of a few thousand eggs, usually after rains in spring. Aquatic larvae metamorphose into terrestrial form in 1-2 months.
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Molecular Biology and Genetics
Molecular Biology
Statistics of barcoding coverage: Bufo terrestris
Public Records: 0
Species: 1
Species With Barcodes: 1
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Conservation
Conservation Status
IUCN Red List Assessment
Red List Category
Red List Criteria
Version
Year Assessed
Assessor/s
Reviewer/s
Justification
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Conservation Status
US Federal List: no special status
IUCN Red List of Threatened Species: least concern
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National NatureServe Conservation Status
United States
Rounded National Status Rank: N5 - Secure
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NatureServe Conservation Status
Rounded Global Status Rank: G5 - Secure
Intrinsic Vulnerability: Moderately vulnerable
Environmental Specificity: Moderate to broad.
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Trends
Population
Population Trend
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Global Short Term Trend: Relatively stable (=10% change)
Comments: Population trend is unknown but probably stable to slightly declining.
Global Long Term Trend: Increase of 10-25% to decline of 30%
Comments: Likely relatively stable in extent of occurrence, probably less than 25% decline in population size, area of occurrence, and number/condition of occurrences, but better information is needed for Mexico.
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Threats
Threats
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Comments: Basically unthreatened. However, this species has become uncommon in areas where introduced Bufo marinus has proliferated in southern Florida (Bartlett and Bartlett 1999).
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Management
Conservation Actions
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Wikipedia
Southern Toad
| This article includes a list of references, related reading or external links, but its sources remain unclear because it lacks inline citations. Please improve this article by introducing more precise citations. (March 2010) |
The Southern Toad (Anaxyrus terrestris) is a medium-sized (approximately 3 inches, the largest recorded toad was 41⁄2 inches) true toad native to the southeastern United States, from eastern Louisiana to southeastern North Carolina. It is most common in areas with sandy soil.[citation needed] Its coloring is usually brown but can be red, gray, or black. It can be kept in a small 5-gallon aquarium lined with unfertilized potting soil, sand, or reptile substrate, as it is a burrowing species. It also needs somewhere to soak, commonly a small water-filled bowl deep enough for it to sit in. The Southern Toad will eat just about any insect that is alive and that can fit in its mouth. The Southern Toad is nocturnal, emerging from its ground burrow around twilight to forage for insects. It spends daylight hours sleeping in its burrow.
Gallery
Note the large parotoid gland
References
- Pauly, G. B., D. M. Hillis, and D. C. Cannatella. (2004) The history of a Nearctic colonization: Molecular phylogenetics and biogeography of the Nearctic toads (Bufo). Evolution 58: 2517–2535.
- Hammerson (2004). Bufo terrestris. 2006. IUCN Red List of Threatened Species. IUCN 2006. www.iucnredlist.org. Retrieved on 10 May 2006. Database entry includes a range map and justification for why this species is of least concern
Unreviewed
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