Indian Greenhouse Frog (Sphaerotheca breviceps) [Commonly confused with and likely a juvenile Sphaerotheca pluvialis]

Order Anura, Family Dicroglossidae, Genus Sphaerotheca. They are known as 'Burrowing Frogs' within the Fork-tongued frog family, characterized by robust bodies and specialized digging metatarsal tubercles.

Species

Family

Size

Adults typically range from 25mm to 50mm in Snout-to-Vent Length (SVL). The specimen in the image appears to be a juvenile or metamorph, likely under 20mm in length.

Conservation

Least Concern (IUCN). They are adaptable to human-modified landscapes like farms and gardens, though local populations can be affected by heavy pesticide use.

Description

This is a quintessential South Asian burrowing frog, often found hiding under leaf litter or in garden pots. Its mottled coat provides perfect camouflage against the earth. As a member of the Dicroglossidae family, it represents the rugged survivors of the amphibian world, thriving in environments that experience extreme wet and dry cycles.

Key Features

Robust rounded body, mottled brown/olive skin, large prominent eyes, and a spade-like digging tubercle on the heel of the hind foot.

Physical Description

A small, robust frog with a rounded snout and a globular body. The eyes are relatively large and prominent with horizontal pupils. The limbs are short and muscular adapted for burrowing, and the hind feet possess a prominent, spade-like inner metatarsal tubercle used for digging backwards into the soil.

Skin Texture & Coloration

The skin is granular or slightly warty on the dorsum. Coloration consists of a mottled olive-brown or greyish-brown background with darker distinct spots or irregular marbling. A thin, pale vertebral line is often present (though may be absent in some individuals). The ventral side is usually smooth and white or yellowish.

Distinguishing Features

The most diagnostic feature is the large, shovel-shaped black inner metatarsal tubercle on the hind foot. In juveniles, look for the 'boxy' head shape and the specific mottled pattern on the dorsal skin which lacks the smooth, streamlined look of Ranid frogs.

Habitat

Found in various habitats including agricultural lands, gardens, scrublands, and deciduous forests. They prefer loose, moist soil where they can burrow during the day or dry periods.

Geographic Range

Native to South Asia, including India, Pakistan, Nepal, and Sri Lanka. They are widely distributed across the Indian subcontinent.

Behavior

Primarily nocturnal and fossorial. They spend much of their time buried in the earth, emerging after heavy rains to feed and breed. When threatened, they may remain still, relying on their soil-like camouflage.

Diet & Feeding

Insectivorous. Adults feed on a variety of small invertebrates including ants, beetles, and termites. They are sit-and-wait predators that strike at moved prey within range.

Reproduction

Explosive breeders triggered by the monsoon rains. Males call from the edges of temporary pools or flooded fields. Eggs are laid in water, and the tadpoles develop quickly to take advantage of ephemeral water sources.

Vocalizations

The call is a series of low-pitched, repetitive croaks or 'quacks', often described as a 'tuk-tuk-tuk' sound that carries well across open fields during rainy nights.

Life Cycle

Standard metamorphic cycle: eggs hatch into aquatic tadpoles within days; the larval stage lasts several weeks depending on temperature and water availability; metamorphs emerge and immediately begin a terrestrial/fossiorial life.

Conservation Status

Least Concern (IUCN). They are adaptable to human-modified landscapes like farms and gardens, though local populations can be affected by heavy pesticide use.

Toxicity & Defense

Non-toxic to humans. Their primary defense is their burrowing lifestyle and cryptic coloration. They may inflate their bodies with air to appear larger to a predator.

Ecological Role

They serve as both a predator of soil invertebrates and a prey source for snakes (like cobras and trinket snakes) and wading birds.

Similar Species

Duttaphrynus melanostictus (Common Indian Toad) which has much warier skin and prominent parotoid glands; Fejervarya species (Cricket Frogs) which are more slender and pointed with long legs.

Observation Tips

The best time to see them is during the first heavy monsoon rains. At night, use a flashlight to scan the edges of puddles or damp garden lawns.

Handling & Safety

Safe to handle, but like all amphibians, they have permeable skin. Always wash hands before and after touching to avoid transferring oils/chemicals to the frog or salmonella to yourself. Use wet hands.

Seasonal Activity

Highly seasonal; they are most active during the monsoon (June-September) and remain dormant (aestivation) deep in the soil during the hot, dry summer months.

Cultural Significance

Often considered a 'farmer's friend' in rural India as they consume significant quantities of agricultural pests during the monsoon season.

Interesting Facts

Despite their clumsy appearance on land, they are incredibly efficient diggers and can disappear into loose soil in seconds using their 'spade' feet.

Identified on 6/28/2026