Eristalinus aeneus
Scientific Name: Eristalinus aeneus
Category: insect
Brief Description
A species of hoverfly often found near coastal areas or water bodies, known for its metallic appearance and ability to hover.
Characteristics
Medium-sized fly with a dark, metallic bronze or blackish abdomen and thorax. It has very large, prominent eyes that are covered in small black spots, which is a key identifying feature of the Eristalinus genus.
Habitat
Typically found in coastal habitats, salt marshes, and near freshwater ponds or lakes. They are commonly seen visiting yellow flowers for nectar.
When to Find It
Most active during the warmer months from spring to late autumn, particularly on sunny days.
Conservation Status
Generally common and not globally threatened.
Ecological Role
Adults are important pollinators for various flowering plants. The larvae are aquatic and help in the decomposition of organic matter in water.
Easily Confused With
Eristalinus sepulchralis, which is very similar but usually has hairs on the eyes and a slightly different body shape. It may also be confused with other hoverflies like Syrphus species which have yellow and black stripes.
Observation Tips
Look for them hovering near flowers or resting on leaves in sunny spots near water. A macro lens is helpful to capture the unique spots on their eyes.
Interesting Facts
Members of this genus are often called 'lagoon flies'. Their larvae are known as 'rat-tailed maggots' because they have a long breathing tube that allows them to live in stagnant water with low oxygen levels.