Limnodynastes dumerilii

Last updated:

Geographic Range

Southern Australia (Walker 1999).

Habitat

Burrows in loamy soil in grassland or wetland and river areas (Walker 1999).

Physical Description

Pobblebonk frogs have warty skin, thick, short legs, and round heads. Ground color is dark to pale grey with dark to bronze marking on the sides. Large glands are visible at the edge of the mouth and tibia region of the leg (Walker 1999). Webbing on the toes may stretch up to 1/4 the length of the toe. Pobblebonk frogs also have prominent teeth (Latham Bathfrog 1999). Adults reach 52-83 mm in size (Walker 1999). A pale "shovel" or spade can be seen on the hind toe (ACT Herpetological Association).

Development

Reproduction

Pobblebonk frogs emerge from burrows to breed after rain. Females lay up to 4,000 eggs in foam nest using specialized skin flaps on the fingers to move bubbles from the water surface into the nest (Walker 1999).

  • Key Reproductive Features
  • gonochoric/gonochoristic/dioecious (sexes separate)

Behavior

The pobblebonk frog is a burrowing frog, usually seen only after rainfall. Advertisement call is a "bonk" or banjo-like single syllable (Walker 1999)

Food Habits

No specific information could be found on this species, but frogs normally eat insects, worms, spiders, and centipedes, and although some frogs may eat fruit, mice, or snakes, (Latham Frog 1999) it can be assumed that the Pobblebonk frog follows the typical frog diet.

Conservation Status

These frogs are often dug up by gardeners (Walker 1999). They also face habitat loss as many Australian grasslands are endangered or threatened at this time (ACT Government 1997).

Other Comments

The supralabial gland - the gland at the corner of the frog's mouth - contains mucous, seromucous, and granular glands. The mucous glands affect osmoregulation. The granular glands secret a rodent repelling agent (Research Report 1998).

Contributors

Vickie Woods (author), Michigan State University, James Harding (editor), Michigan State University.

Glossary

Australian

Living in Australia, New Zealand, Tasmania, New Guinea and associated islands.

World Map

bilateral symmetry

having body symmetry such that the animal can be divided in one plane into two mirror-image halves. Animals with bilateral symmetry have dorsal and ventral sides, as well as anterior and posterior ends. Synapomorphy of the Bilateria.

ectothermic

animals which must use heat acquired from the environment and behavioral adaptations to regulate body temperature

metamorphosis

A large change in the shape or structure of an animal that happens as the animal grows. In insects, "incomplete metamorphosis" is when young animals are similar to adults and change gradually into the adult form, and "complete metamorphosis" is when there is a profound change between larval and adult forms. Butterflies have complete metamorphosis, grasshoppers have incomplete metamorphosis.

motile

having the capacity to move from one place to another.

native range

the area in which the animal is naturally found, the region in which it is endemic.

References

1998. "1998 Research Report - Biology of Frogs and Reptiles" (On-line). Accessed 10 December 1999 at http://www.science.adelaide.edu.au/envbiol/resrep/resrep12.htm.

"ACT Herpetological Association - Limnodynastes dumerilii" (On-line). Accessed 10 December 1999 at http://aerg.canberra.edu.au/pub/aerg/herps/actha/limdu.htm.

ACTGovernment, 1997. "Natural temperate grassland: An endangered ecological community." (On-line). Accessed 10 December 1999 at http://ww.act.gov.au/environ/actionplans/GRASLAND.html.

Latham, C. 1999. "Frogs of the Bathurst Region" (On-line). Accessed 10 December 1999 at http://www.csu.edu.au/faculty/commerce/account/frogs/bathfrog.htm.

Latham, C. 1999. "The Somewhat Amusing World of Frogs" (On-line). Accessed 10 December 1999 at http://www.csu.edu.au/faculty/commerce/account/frogs/frog.htm.

Walker, S., B. Hill. 1999. "Eastern Banjo Frog" (On-line). Accessed 10 December 1999 at http://www.dehaa.sa.gov.au/epa/frogcensus/dumerili.htm.