Identification
The Cane Toad is a titan among amphibians, frequently reaching 10–15 cm, though "monster" specimens can exceed 24 cm. They possess a heavy, squat build with dry, warty skin ranging from olive-brown to a dusty yellow. Look for the defining "field marks": massive, triangular **parotoid glands** swelling behind each eye, which angle down toward the shoulders. Unlike many native toads, *R. marina* features prominent bony ridges (cranial crests) that meet in a distinct "M" shape above the snout. If you see a toad larger than your palm with these massive, pitted shoulder pads, you’ve found a Cane Toad.
Habitat & Range
Originally native to the Neotropics—stretching from the Rio Grande Valley in Texas to the central Amazon—this resilient species has become a global traveler. It thrives in open grasslands, disturbed forests, and urban gardens, generally avoiding deep closed-canopy rainforests. They are incredibly adaptable, found from sea level up to 1,600 meters, provided there is a semi-permanent water source nearby for their long, stringy egg clutches.
Behaviour
Strictly nocturnal, the Cane Toad is a "sit-and-wait" predator. You’ll often spot them beneath streetlights or porch lamps, stoically waiting for insects drawn to the glow. They are terrestrial and clumsy jumpers, preferring a slow, deliberate crawl. During the breeding season, males produce a low, rhythmic "drrrr" trill that sounds more like a distant idling motor than a typical frog croak.
Diet
These are biological vacuum cleaners. While they primarily hunt beetles, ants, and winged termites, they are famously indiscriminate. They will consume small lizards, other frogs, mice, and even bird eggs. In suburban areas, they are notorious for "raiding" outdoor pet bowls to eat dry cat or dog food.
Fascinating Fact
The Cane Toad is chemically armed from birth to death. Not only are the adults' parotoid glands filled with a milky cocktail of bufotoxins, but their **eggs and tadpoles are also highly toxic** if ingested. This "cradle-to-grave" toxicity has caused massive population crashes in predators like Australian crocodiles and quolls, who haven't evolved to survive a single bite of this invasive amphibian.