Black Howler Monkey vs Cliff Chirping Frog

Alouatta pigra compared with Eleutherodactylus marnockii

Key Differences

• Black Howler Monkey is Endangered while Cliff Chirping Frog is Least Concern.

Taxonomic Classification

Rank	Black Howler Monkey	Cliff Chirping Frog
Kingdom same	Animalia (動物)	Animalia (動物)
Phylum same	Chordata (脊索動物)	Chordata (脊索動物)
Class	Mammalia (哺乳類)	Amphibia (両生類)
Order	Primates (サル目)	Anura (カエル)
Family	Atelidae	Eleutherodactylidae
Genus	Alouatta	Eleutherodactylus
Species	Alouatta pigra	Eleutherodactylus marnockii

Evolutionary Relationship

Black Howler Monkey and Cliff Chirping Frog share a common ancestor at the Phylum level: Chordata. (脊索動物)

Conservation Status

Black Howler Monkey

EN — Endangered

Cliff Chirping Frog

LC — Least Concern

Physical Characteristics

Attribute	Black Howler Monkey	Cliff Chirping Frog
Diet	—	—
Average Lifespan	—	—
Average Length	—	—
Average Weight	—	—

Habitat & Geographic Range

Black Howler Monkey

Habitat

Typically found in diverse terrestrial and aquatic ecosystems.

Cliff Chirping Frog

Habitat

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

Range

Found in Mexico.

Black Howler Monkey

The Black Howler Monkey (Alouatta pigra) is a species in the genus Alouatta. It is currently classified as Endangered on the IUCN Red List. Typically found in diverse terrestrial and aquatic ecosystems.

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.