Rana cancrivora Gravenhorst
Vertebrate - Amphibian
Palakang Palayan; Palakang Bukid
Least Concern (IUCN)
Brackishwater frogs are heavily muscled amphibians with stocky bodies and short legs. A mature brackishwater frog measures 46 to 88 mm from tip of the mouth to anus. It has irregular longitudinal fold of skin at the back. Distinct supratympanic fold is present. Tips of fingers are not flat but somewhat pointed. Webs on feet are deeply excised between toes and a thin flap of skin on outer side of the fifth toe is present. When alive, these frogs are gray or brown in color with irregular-shaped darker marks. A pair of black spots on the sides of the throat that do not meet in the middle is also present. They have white or cream mottling on the lower part of the body. The legs have dark crossbars with white or cream color below. Lips have dark bars.
Brackishwater frogs are common in ricefields in the lowlands, ditches, ponds, and mangrove swamps. Being an amphibian, they can tolerate saline water and brackish water. They feed on insects, crabs, and other invertebrates. They breed in freshwater ponds and spawn during February or March to September (rainy season).
Brackishwater frogs are common and are found all over the Philippines near sea level. They are economically significant especially in the provinces where food commodity is of great value to local populace. Its meat is sought specially in Northern Luzon market places. They help farmers by eating loads of insects that are pests to crops and humans. They also serve as food for other animals such as snakes and birds. Children often see them in vicinities where there is pool of water - canals in grassland areas or farmland around Manila such as Laguna, Cavite, Novaliches and Bulacan. They are usually chanced upon during nighttime with the aid of flashlight.