Bufo marinus

 

Size: Largest Costa Rican amphibian; among largest anurans in the world; males 85-145 mm length, females 90-175 mm; females weigh up to 1.5 kg.

Voice: Low-pitched trill lasting 10-20 sec, reminiscent of the exhaust of a distant tractor.

Habitat: All lowland and premontane zones.

Biology: Nocturnal; active during wet season; greatest densities in agricultural areas and urban sprawl - up to 300/ha; aggressive predator - will eat almost anything it can catch; parotoid gland , toxic properties of eggs and larvae are effective anti-predator defense mechanisms.

Note: Has been widely introduced in efforts to reduce insect pest populations and in most areas are now considered pests, especially in Australia, where it now ranges across the eastern coast tropical and subtropical regions.

Source: Savage, Jay M. 2002. The Amphibians and Reptiles of Costa Rica. The University of Chicago Press, Chicago. 935pp.

 

Juvenile:

 

 

 

 

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