common vincetoxicum vs Gray-shanked Douc Langur

Vincetoxicum hirundinaria compared with Pygathrix cinerea

Key Differences

• common vincetoxicum is Extinct while Gray-shanked Douc Langur is Critically Endangered.

Taxonomic Classification

Rank	common vincetoxicum	Gray-shanked Douc Langur
Kingdom	Plantae (Plants)	Animalia (Animals)
Phylum	Magnoliophyta (Flowering Plants)	Chordata (Chordates)
Class	Magnoliopsida (Dicots)	Mammalia (Mammals)
Order	Gentianales (Gentianales)	Primates (Primates)
Family	Apocynaceae	Cercopithecidae (Old World Monkeys)
Genus	Vincetoxicum	Pygathrix
Species	Vincetoxicum hirundinaria	Pygathrix cinerea

Conservation Status

common vincetoxicum

EX — Extinct

Gray-shanked Douc Langur

CR — Critically Endangered

Physical Characteristics

Attribute	common vincetoxicum	Gray-shanked Douc Langur
Diet	—	—
Average Lifespan	—	—
Average Length	—	—
Average Weight	—	—

Habitat & Geographic Range

common vincetoxicum

Habitat

Typically found in diverse terrestrial habitats from tropical forests to temperate regions.

Range

Found across Europe (6 countries) and North America (Canada, United States).

Gray-shanked Douc Langur

Habitat

Typically found in diverse terrestrial and aquatic ecosystems.

common vincetoxicum

<em>Vincetoxicum hirundinaria</em>, commonly known as common vincetoxicum or white swallowwort, is a perennial herbaceous plant in the family Apocynaceae (subfamily Asclepiadoideae) that was historically distributed across much of Europe and western Asia. The species typically grew in dry calcareous grasslands, rocky slopes, scrubland, and open woodland edges, particularly on warm, south-facing habitats with shallow soils rich in lime. <em>Vincetoxicum hirundinaria</em> is characterized by twining stems, opposite ovate leaves, and small, star-shaped white to pale yellow flowers produced in summer, followed by elongated seed pods that release wind-dispersed seeds with silky hairs. As a member of the milkweed subfamily, it historically served as a larval host plant for certain specialized butterfly species in Europe, contributing to local food web dynamics. The plant is notable for containing toxic alkaloids and glycosides that were historically used in folk medicine. Tragically, <em>Vincetoxicum hirundinaria</em> is currently assessed as Extinct by the IUCN, having been lost from the regions where it was previously documented. The factors contributing to its extinction likely include habitat destruction, agricultural intensification, and loss of calcareous grassland habitats across Europe. Biological traits such as average lifespan, plant dimensions, and precise weight remain poorly documented in historical records.