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Bibio marci

St. Marks fly

Description

St. Mark\'s fly Bibio marci is a species of fly in the family Bibionidae and is also commonly known as the Hawthorn fly or the Hawthorn blossom fly. The wingspan of Bibio marci, also known as St. Mark\'s fly or the Hawthorn fly, typically ranges from 12 to 22 millimeters. It is typically found in Europe and is known for its appearance in large mating swarms during the month of April, around the time of St. Mark\'s Day (April 25th). The males have long legs and are black in color, while the females have shorter legs and are brownish in color. The larvae of this species are soil-dwelling and feed on decaying plant material. Larvae can be harmfull sometimes, when in a large number feeds on roots of young seedlins. Additionally, the adult flies have a short lifespan and do not typically cause any significant harm to humans or animals. In fact, these flies can be beneficial to the environment by serving as a food source for other animals such as birds and spiders.

Symptom

Black flies on the leaves of trees occur in large numbers, especially at the end of April and in May.

Tree Species: Oak, Different tree species

Part of a plant- attacked: Roots

Pest significance: Less harmful

Pest Category: Insects

Invasive Species: No

Present in EU: Yes

Last observations

There are a total of 2 observations of the species in the system

Bibio marciSt. Marks fly
Martina Tóthová
Number of votes: 0
Published: 9.4.2024

Bibio marciSt. Marks fly
Martina Tóthová
Number of votes: 0
Published: 9.4.2024

Bibio marciSt. Marks fly
Martina Tóthová
Number of votes: 0
Published: 9.4.2024

Bibio marciSt. Marks fly
Pytel Martin
Number of votes: 0
Published: 1.5.2023