Vörös Őszibagoly Conistra rubiginea Dotted Chestnut |
I had heard before from lepidopterists about how great a time can be had recording moths at Ivy (Hedera helix) blossom but until now my efforts to find moths in this way had been pretty disappointing. Its advantage for the moth recorder is that it flowers late in the year when other possible nectar sources are becoming scarcer. It can therefore function as a relatively efficient natural attractant, focussing the feeding moths present in a habitat together into one place. In Britain , where ivy is a very common woodland plant, finding good stands of it in bloom can be less easy than you might expect - the plants need warmth and sun to produce much blossom. Edges of woods can be good but often the flowers are too high to inspect easily. And then you need the weather conditions to coincide - the evenings need to be warm and calm enough for moths to be actively feeding. Conditions in the British autumn and early winter are often not like that. Living in Scotland where Ivy doesn't even always flower didn't help but even when I have found suitable clumps in England usually it has been in the wrong place and the wrong time for me to observe many moths.
This year was different because I was in Hungary and in a house which has a big, south-facing patch of ivy alongside it which was well into bloom by late September. In Britain Hedera helix is often in flower a month later and tends to be visited mainly by winter Geometrids and the over-wintering species of Noctuidae (Leverton 2001 Enjoying Moths Poyser). Thronged with Hymenoptera and Diptera by day there were also good numbers of Lepidoptera by night. In the period from 27th September to October 5th, when the evenings were generally warm, I made 53 records consisting of 20 species (about the same number of species as my 40W actinic light trap attracted at the end of September) although I am sure these numbers underplay the total amount of moth activity there was. After that, although there was still sufficient nectar to attract flies by day for another week or two, the nights became distinctly cooler and no more moths were to be found.
Four families were represented but three of these, the Pterophoridae, Arctiidae and Geometridae, only by single individuals; most of the moths were Noctuids. There were 2 species of 'any month' moth (Phlogophora meticulosa and Emmelina monodactyla) plus a Buttoned Snout (Hypena rostralis), a species with a protracted flight period, and four species of Noctuid which overwinter as adults. The rest were summer or autumn species and although not a huge diversity there was a good range of species some of which, at least for me, were rather choice.
A list of the 20 species of lepidoptera found naturally feeding at Hedera helix blossom in late September- Early October 2012, Miskolctapolca, Hungary
Bükkönybagoly Lygephila craccae Scarce Blackneck |
No comments:
Post a Comment