DSLR's picture

IMG_76624TH OCTOBER 2013

Observed: 4th October 2013 By: DSLRDSLR’s reputation in InvertebratesDSLR’s reputation in Invertebrates
IMG_76624TH OCTOBER 2013
IMG_76595TH OCTOBER 2013a

No identification made yet.

Species interactions

No interactions present.


stevegregory's picture

A slug with its head chopped

A slug with its head chopped off?

DSLR's picture

A slug with its head chopped

Well, Steve, the slug was climbing a tree when I photographed it, and would a slug be full of little baby slug-like wriggling, crawling things, if its head was cut off?

I've not seen this before, and I have photographed a lot of tree climbing slugs.

markwilson's picture


From Wikipedia

Insects such as dipterans are known parasitoids of mollusks. To complete their development, many dipterans use slugs as hosts during their ontogeny. Some species of blow-flies (Calliphoridae) in the genus Melinda are known parasitoids of Arionidae, Limacidae and Philomycidae. Flies in the family Phoridae, specially those in the genus Megaselia, are parasitoids of Agriolimacidae, including many species of Deroceras.[29] House flies in the family Muscidae, mainly those in the genus Sarcophaga, are facultative parasitoids of Arionidae.[30]

From http://www.cf.ac.uk/biosi/staffinfo/wocs2.html

The most important parasites of slugs are the marsh flies (sciomyzids). The females lay 300 eggs or more, and each developing larva will kill several slugs, especially field slugs. Although called marsh flies, these insects are not confined to wet areas and can be found wherever there are slugs. You have to be an expert to identify them as they are simply anonymous looking flies, about 6 mm long, but it is very good to know that they are there.