VCSU Macro-Invertabrate Lab
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Order Diptera - The Crane Flies
Distinguishing characteristics - The head of Crane fly larva is usually partially retracted into thorax (Fig. B). The most distinctive feature of the larvae is the spiracular disc found on the end of the abdomen which is surrounded by 1-3 or 5-7 variously developed lobes (Fig. C), which are often fringed with hairs (Fig. D).

Tolerance Value - 4

Feeding Group - Shredder

Notes - This is a fairly large group in terms of species and the aquatic larvae have a variety of forms in their spiracular disk. They are found in a variety of aquatic environments. Some are predators, some eat periphyton, others eat wood and have bacteria that break up cellulose, and some are omnivorous. The size of the Crane Flies at maturity is usually 10-25 mm, however they sometimes are as long as, or just shy of 100 mm.

Penny Picture

Range Map

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