Spotted Grass Frog
Background
The Spotted Grass Frog is the most common frog in Australia. It is characterised by olive-green or brown spots on a pale greyish-brown background which may change over the course of the day, being particularly pale at night. The ventral (lower) surface of the body is smooth and white. Breeding males have a dark yellow-green throat. Many specimens have a mid-dorsal stripe which may range from white or yellow through to rusty red. Females have large flanges (flaps of skin) on the first two fingers.

Spotted Grass Frog
Spotted Grass Frog with dorsal stripe
(Photo: Steve Walker)
(Photo: Steve Walker)

Characteristics
Spotted Grass Frog distribution
Spotted Grass Frog distribution map

Size: Males 31-42 mm; Females 32-47 mm.

Habitat: A widespread species, habitat includes marshy country, creek edges and wetlands.

Breeding: Males call from the edge of shallow water and are often concealed by vegetation. Breeding can occur at any time of the year, particularly between August and March. A foam nest of 90-1300 eggs is laid floating in water attached to submergent vegetation. Larval development generally occurs for 3-5 months but may take anywhere up to a year in colder waters. Tadpoles are about 46 mm long.

Advertisement call: Three distinct call races are present in South Australia.

Southern: a short, single ‘click’ (Blue stripe).
Northern: a rapid, sharp ‘duk-duk-duk-duk' (2-4 notes, average of three in SA - Red stripe).
Western: rapid, soft ‘uk-uk-uk-uk’ (3-6 notes, average of four in SA - Green stripe).


 

  Top of Page  
   
   
Privacy, Dislaimer and Copyright Disclaimer Copyright Privacy Environment Protection Authority - Government of South Australia SA Government logo. Link to Minister's web site Environment Protection Authority