black-shanked douc vs Compact Thread-leaf Century Plant

Pygathrix nigripes compared with Agave microceps

Key Differences

• black-shanked douc is Critically Endangered while Compact Thread-leaf Century Plant is Least Concern.

Taxonomic Classification

Rank	black-shanked douc	Compact Thread-leaf Century Plant
Kingdom	Animalia (Animals)	Plantae (Plants)
Phylum	Chordata (Chordates)	Magnoliophyta (Flowering Plants)
Class	Mammalia (Mammals)	Liliopsida (Monocots)
Order	Primates (Primates)	Asparagales (Asparagales)
Family	Cercopithecidae (Old World Monkeys)	Asparagaceae
Genus	Pygathrix	Agave
Species	Pygathrix nigripes	Agave microceps

Conservation Status

black-shanked douc

CR — Critically Endangered

Compact Thread-leaf Century Plant

LC — Least Concern

Physical Characteristics

Attribute	black-shanked douc	Compact Thread-leaf Century Plant
Diet	—	—
Average Lifespan	—	—
Average Length	—	—
Average Weight	—	—

Habitat & Geographic Range

black-shanked douc

Habitat

Typically found in diverse terrestrial and aquatic ecosystems.

Compact Thread-leaf Century Plant

Habitat

Typically found in grasslands, wetlands, forests, and cultivated landscapes.

black-shanked douc

The Black-shanked douc (Pygathrix nigripes) is a species in the genus Pygathrix. It is currently classified as Critically Endangered on the IUCN Red List. Typically found in diverse terrestrial and aquatic ecosystems.

Compact Thread-leaf Century Plant

<em>Agave microceps</em>, the compact thread-leaf century plant, is a perennial succulent in the family Asparagaceae native to Mexico, representing one of the smaller members of the ecologically and culturally significant agave genus. Agaves are iconic succulents of arid and semi-arid regions characterised by a rosette of thick, fibrous leaves typically edged with teeth and terminating in a sharp spine. <em>Agave microceps</em> typically forms compact, densely-leaved rosettes with notably narrow, thread-margined leaves, distinguishing it from larger agave species. It inhabits rocky slopes, dry grasslands, and scrublands in its native Mexican range, adapted to well-drained soils and periods of seasonal drought. Like all agaves, it is monocarpic, flowering once after many years of vegetative growth before dying, producing a tall flower spike that provides food resources for bats, hummingbirds, and insects. The species is classified as Least Concern by the IUCN, indicating a stable population without critical current threats, though many agave species face pressure from illegal collection for the horticultural trade and habitat conversion. Agaves play important roles in native ecosystems as food sources for specialist pollinators and as habitat elements on rocky hillsides. Biological traits including average lifespan in the wild, precise rosette dimensions, and population data remain poorly documented for this species compared to more commercially important agaves.