• Animals (Kingdom Animalia)

• Chordates (Phylum Chordata)

• Vertebrates (Subphylum Vertebrata)

• Amphibians (Class Amphibia)

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Amphibians are a class of cold-blooded vertebrate animals belonging to the class Amphibia that includes frogs, toads, salamanders, newts, and caecilians. They are characterized by their ability to live both in water and on land during different stages of their life cycle. Most amphibians begin life as aquatic larvae that breathe through gills and later undergo metamorphosis into adults that typically breathe through lungs and their moist, permeable skin.

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Approximately 20–25 species of amphibians can be found in the Zihuatanejo area (including the municipality and surrounding lowland forests, wetlands, streams, and foothills of the Sierra Madre del Sur).

These amphibians are almost entirely frogs and toads (Order Anura), as the hot, seasonally dry Pacific coastal environment is not suitable for the high diversity of salamanders and newts found in the cooler mountains of Guerrero. 

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During the rainy season (June–October), amphibian activity increases dramatically, and many species emerge to breed in temporary pools, roadside ditches, marshes, and slow-moving streams.