Coastal Silver-stiletto vs Hipopótamo Anfibio

Acrosathe annulata compared with Hippopotamus amphibius

Key Differences

• Coastal Silver-stiletto is Least Concern while Hipopótamo Anfibio is Vulnerable.

Taxonomic Classification

Rank	Coastal Silver-stiletto	Hipopótamo Anfibio
Kingdom same	Animalia (Animals)	Animalia (Animals)
Phylum	Arthropoda (artrópodos)	Chordata (cordados)
Class	Insecta (insecto)	Mammalia (mamíferos)
Order	Diptera (Diptera)	Artiodactyla (artiodáctilos)
Family	Therevidae	Hippopotamidae (Hippos)
Genus	Acrosathe	Hippopotamus (Hippos)
Species	Acrosathe annulata	Hippopotamus amphibius

Evolutionary Relationship

Coastal Silver-stiletto and Hipopótamo Anfibio share a common ancestor at the Kingdom level: Animalia. (Animals)

Conservation Status

Coastal Silver-stiletto

LC — Least Concern

Hipopótamo Anfibio

VU — Vulnerable

Population: ~130.0K

Trend: Decreasing ↓

Physical Characteristics

Attribute	Coastal Silver-stiletto	Hipopótamo Anfibio
Diet	—	Herbivore
Average Lifespan	—	40 years
Average Length	—	3.5 m
Average Weight	—	1.5 t

Habitat & Geographic Range

Coastal Silver-stiletto

Habitat

Typically found in virtually all terrestrial and freshwater habitats.

Range

Distributed across Belgium, Denmark, Norway, and Sweden.

Hipopótamo Anfibio

Habitat

Found across multiple habitat types including tropical and subtropical moist broadleaf forests, tropical and subtropical grasslands and savannas, and flooded grasslands and savannas, among 5 distinct biome types within the Afrotropic biogeographic realm. Populations are also found in montane and highland environments at higher elevations.

Range

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

Coastal Silver-stiletto

Coastal silver stiletto (Acrosathe annulata) is a slender robber fly in the family Therevidae, native to northwestern Europe, including the United Kingdom, France, the Netherlands, Belgium, and Scandinavia. Adults are found on coastal sand dunes and sandy heathland, where they perch on bare sand to ambush small flying insects. Stiletto flies in the family Therevidae are characterised by a slender body, long pointed abdomen, and predatory habits; adults prey on a variety of small dipterans and other flying insects during warm, sunny periods. Larvae develop in sandy soil, where they are also predatory, feeding on other invertebrate larvae. Acrosathe annulata is a habitat specialist restricted to open, sandy coastal habitats with sparse vegetation—environments that have declined substantially across northwestern Europe due to dune stabilisation, recreational disturbance, and the cessation of traditional dune management. The IUCN lists it as Least Concern, though regional conservation bodies in the United Kingdom have flagged population declines. It is considered an indicator of high-quality coastal sand dune habitats and is monitored through national invertebrate surveys.

Hipopótamo Anfibio

El mamífero terrestre grande más peligroso de África, el hipopótamo común (Hippopotamus amphibius) puede alcanzar los 3.200 kg y habita ríos, lagos y humedales del África subsahariana. Semiacuático, pasa hasta 16 horas diarias sumergido para mantenerse fresco y pace en tierra por la noche. Pese a su apariencia tranquila, es extremadamente agresivo y territorial, responsable de cientos de muertes humanas cada año. Clasificado como Vulnerable, sus poblaciones están amenazadas por la pérdida de hábitat y la caza furtiva de colmillos de marfil.