Sue, Tim, Douglas and Peter considering the options |
Once
Douglas had given us the basics, off we all went searching each tree and plant
around the nature reserve for what we hoped would be Lepidoptera. The weather was fairly kind to us, and the
site excellent.
The leaf miners fall into a number of families with different mining characteristics, so some of them tunnel in the leaf causing gallery mines and occasionally leading to blotches (the Nepticulidae) and some make folds or blisters or blotches, or even cones (Gracillariidae). Some mines are found in the leaves, but some are found in the seeds – for example Field Maple.
We targeted certain “easier” trees: Field Maple, Alder, Ash, Blackthorn & Hazel, and with Douglas’ help we were able to identify a number of species. For example on Hazel we found all three gracillariid species – one which causes a blister on top of the leaf (Phyllonorycter coryli), one where the larva feeds in a rolled leaf edge (Parornix devoniella) and one a long mine with a strong central fold (Phyllonorycter nicellii).
Some species are not identifiable from the mine alone, and you
need the larva or to rear to be certain. And some trees are more challenging –
for example Oak, which has many species living on it. This didn’t stop Gavin searching every Oak
tree!
The leaf miners fall into a number of families with different mining characteristics, so some of them tunnel in the leaf causing gallery mines and occasionally leading to blotches (the Nepticulidae) and some make folds or blisters or blotches, or even cones (Gracillariidae). Some mines are found in the leaves, but some are found in the seeds – for example Field Maple.
We targeted certain “easier” trees: Field Maple, Alder, Ash, Blackthorn & Hazel, and with Douglas’ help we were able to identify a number of species. For example on Hazel we found all three gracillariid species – one which causes a blister on top of the leaf (Phyllonorycter coryli), one where the larva feeds in a rolled leaf edge (Parornix devoniella) and one a long mine with a strong central fold (Phyllonorycter nicellii).
Phyllonorycter rajella on Alder |
We
didn’t spot many flying moths – just a Nettle-tap ably netted by Gavin and a
Brown China Mark seen by the canal and captured by the swift camera of Sue. We also found the larva of a Mother of Pearl
wrapped up in a nettle leaf and a Yellow-tail larva in an Oak tree.
Among the highlights of the day were the breeding record of Caloptilia falconipella, found on Alder.
Altogether we totalled 32 records – mostly leaf miners – so it
just shows that it is worth taking time to look at the little things – and it
is something you can do all year round and really add to the records. There is a book: “Micro-moth Field Tips” by
Ben Smart, which is a guide to finding the early stages of micro moths (not
just miners) by every month of the year.
Worth a look. It means we can
keep moth-ing right through the year. For full species list click here.
Many
thanks to Douglas for a really interesting session (and for making sure I got this report right!), and to Sue for taking photos and keeping the list of records on the day, and to everyone that turned up (even Peter found us eventually!).
Brown China Mark |
Caloptilia Stigmatella on Willow
|
Caloptilia semifascia - the larva feeds in a cone
formed from the leaf of a Field Maple.
|
This was an excellent leafmine workshop which was well attended and led by Douglas. Everyone learnt how to id some of the more common moth mines and how to avoid some of the fly mines - which I'm sure this will encourage us all to get out there and look for more mining species.
ReplyDeletePeter.
Many thanks for this great write-up, Julie. And thanks again to Sue for keeping track of what we found. It was great to find lots of mines - all new to the site (and many to the 10km square also!)
ReplyDeleteHopefully the workshop was useful. In addition to www.leafmines.co.uk, another useful resource is www.ukflymines.co.uk (which doesn't just include Diptera but has keys for plants that cover all leaf-mining insects).
The day after the event, I was driving through Llanfyllin and noticed some large Black Poplars (or hybrids thereof). A quick stop produced several Stigmella trimaculella - a new species to the county. Just goes to show that there's plenty to still learn about the leaf mine fauna of VC47!
Happy hunting!
Douglas