Natterjacktoad's picture

Abundance of flies with rolled wings

Observed: 27th September 2012 By: Natterjacktoad
S159 Neighbourhood Nature - course complete
Natterjacktoad’s reputation in InvertebratesNatterjacktoad’s reputation in InvertebratesNatterjacktoad’s reputation in InvertebratesNatterjacktoad’s reputation in Invertebrates
IMG_6824-001
Description:

Seen near river in Bakewell, at Dovedale and near Brown End Quarry.

Identifications
Species interactions

No interactions present.

Comments

jonmortin's picture

Derbyshire is now part of

Derbyshire is now part of China!

Natterjacktoad's picture

I have a specimen if there is

I have a specimen if there is any straightforward way of getting to species?

Sarah Patton

inopinatus's picture

Species ID

At this time of year I would say it's likely to be either Leuctra fusca or Leuctra geniculata.

If you look closely at the antennae can you see the hairs on them? If they are clearly arranged in rings around each segment then it is Leuctra geniculata (known as the Willow fly, this species is also larger and more sturdy looking than the Needle flies). Otherwise it is likely to be Leuctra fusca, but could potentially be another of the Needle flies that has emerged late in the season.

Natterjacktoad's picture

Yep! Several localities in

Yep! Several localities in the area came up with eastern characters!

Sarah Patton

jonmortin's picture

Id to species might be

Id to species might be tricky. There is a very old key which involves genitalia dissection so I gave up!

Natterjacktoad's picture

Sounds like a good idea ;)

Sounds like a good idea ;)

Sarah Patton