Cliff Chirping Frog vs Gray-bellied Night Monkey

Eleutherodactylus marnockii compared with Aotus lemurinus

Key Differences

• Cliff Chirping Frog is Least Concern while Gray-bellied Night Monkey is Vulnerable.

Taxonomic Classification

Rank	Cliff Chirping Frog	Gray-bellied Night Monkey
Kingdom same	Animalia (Animals)	Animalia (Animals)
Phylum same	Chordata (Chordates)	Chordata (Chordates)
Class	Amphibia (Amphibians)	Mammalia (Mammals)
Order	Anura (Frogs & Toads)	Primates (Primates)
Family	Eleutherodactylidae	Aotidae
Genus	Eleutherodactylus	Aotus
Species	Eleutherodactylus marnockii	Aotus lemurinus

Evolutionary Relationship

Cliff Chirping Frog and Gray-bellied Night Monkey share a common ancestor at the Phylum level: Chordata. (Chordates)

Conservation Status

Cliff Chirping Frog

LC — Least Concern

Gray-bellied Night Monkey

VU — Vulnerable

Physical Characteristics

Attribute	Cliff Chirping Frog	Gray-bellied Night Monkey
Diet	—	—
Average Lifespan	—	—
Average Length	—	—
Average Weight	—	—

Habitat & Geographic Range

Cliff Chirping Frog

Habitat

Typically found in freshwater habitats, moist forests, and wetlands.

Range

Found in Mexico.

Gray-bellied Night Monkey

Habitat

Typically found in diverse terrestrial and aquatic ecosystems.

Range

Distributed across Colombia, Ecuador, and Venezuela. Currently classified as Vulnerable on the IUCN Red List, this species faces significant conservation challenges across its range.

Cliff Chirping Frog

The Cliff Chirping Frog, Syrrhophus marnockii (also known as Eleutherodactylus marnockii), is a small terrestrial frog in the family Eleutherodactylidae native to the Edwards Plateau and adjacent areas of central Texas in the United States and northern Mexico. This tiny frog, typically only 2–3 cm in length, is adapted to rocky limestone terrain, hiding in crevices, under rocks, and in the thin soil pockets on cliff faces, rocky outcrops, and canyon walls. The species is named for its high-pitched, insect-like chirping calls produced by males, particularly on humid nights following rainfall. Unlike many frogs, the Cliff Chirping Frog undergoes direct development: eggs are laid in moist rock crevices and develop directly into miniature froglets without a free-living aquatic larval stage, eliminating dependence on standing water for reproduction. Diet consists of small arthropods, insects, and other invertebrates encountered in rocky microhabitats. The species is cryptic and rarely seen but can be abundant in suitable habitat on the Edwards Plateau, an area of karst limestone geography. It is currently assessed as Least Concern by IUCN, with populations considered stable across its rocky limestone range.