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

This species occurs in the Coastal Plain, USA, from southeastern Virginia to the Florida Keys, west to Louisiana; disjunctive population in Upper Piedmont and Blue Ridge of South Carolina (but not Georgia) (Laerm and Hopkins 1997).
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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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endemic to a single nation

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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

Found in the coastal plain from southeastern Virginia to the Florida Keys, and westward along the gulf coast to eastern Louisiana. Abundant throughout it's range, but particularly common in areas with sandy soils. May attempt to breed in almost any aquatic 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

Length: 11 cm

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Type Information

Syntype for Anaxyrus terrestris
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

Habitat and Ecology
It is 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.

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

Comments: Inactive during coldest months.

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Life Expectancy

Lifespan/Longevity

Average lifespan

Status: captivity:
10 years.

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Lifespan, longevity, and ageing

Maximum longevity: 10 years (captivity)
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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

Barcode of Life Data Systems (BOLDS) Stats
Public Records: 0
Species: 1
Species With Barcodes: 1

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Conservation

Conservation Status

IUCN Red List Assessment


Red List Category
LC
Least Concern

Red List Criteria

Version
3.1

Year Assessed
2004

Assessor/s
Geoffrey Hammerson

Reviewer/s
Global Amphibian Assessment Coordinating Team (Simon Stuart, Janice Chanson, Neil Cox and Bruce Young)

Justification
Listed as Least Concern in view of its wide distribution, tolerance of a broad range of habitats, presumed large population, and because it is unlikely to be declining fast enough to qualify for listing in a more threatened category.
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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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Population

Population
It is common in many areas throughout range, despite habitat alteration.

Population Trend
Stable
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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

Major Threats
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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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

Conservation Actions
No conservation needed.
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Wikipedia

Southern Toad

The Southern Toad (Anaxyrus terrestris) is a medium-sized (approximately 3 inches, the largest recorded toad was 412 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

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
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