CLOSED: CLOSED: CLOSED: What\\\\\\\\\\\\\\\'s this bug

London, United Kingdom

Hi, can anyone identify this bug of which has infested my black elder tree.

They measure up to approx. 25mm and grip very tightly to the plant.

Thumbnail by Jelldave
Minot, ND

Can you provide additional images that would show this creature's head and side(s)?

London, United Kingdom

It's a bit difficult getting decent pictures because it won't keep still.
Hopefully these will help. Many thanks

Thumbnail by Jelldave Thumbnail by Jelldave Thumbnail by Jelldave Thumbnail by Jelldave Thumbnail by Jelldave
Minot, ND

It appears to be a larva of a fly in the family Syrphidae (hover/flower flies). Ones like these are predators on small, soft-bodied insects, especially aphids. see http://www.microscopy-uk.org.uk/mag/imgmay07/larva.jpg for an image and http://www.microscopy-uk.org.uk/mag/indexmag.html?http://www.microscopy-uk.org.uk/mag/artmay07/cd-hoverflies.html for more detailed information.

London, United Kingdom

Many thanks. That makes sense because the plant is covered in black fly
Will these larvae have any harmful effects on the plant

Minot, ND

Quote from Jelldave :

Will these larvae have any harmful effects on the plant


No, they will have no effect other than the removal of the insects they are feeding upon.

London, United Kingdom

Great that's good news. Many thanks for your help. Greatly appreciated

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