Walking up Brakey Bank this morning I was pleasantly surprised to find some Bluebells out in flower and fully out too. Not many but plenty of Wood Anemones, a few Celandines and a couple of Red Campion too. That coupled with finding two Gorse Shieldbugs on Monday makes one feel that despite the incessant wind and rain, Spring is still able to make it’s presence felt.
Ghostly goings on in the Quarry? Well actually no. These webs are created by Tetranycus lintearius the Gorse Spider Mite. The adults are half a millimetre long and bright red. A native to Europe, it has been introduced to other countries as a biological control measure, although it does not actually kill gorse it can reduce flowering and stunt the development of branches. The mites pierce the tissues of the plant whilst feeding.
A couple of interesting photos today, the first is also a first for me as it is a teneral adult Birch Shieldbug. The teneral stage occurs when the final instar nymph moults into an adult and the exoskeleton has not yet hardened and it is very pale in colour. The first picture is the teneral and the second is a mature adult for comparison.
The third photo is of a pair of Parent Bugs mating to produce what I understand to be a second brood at this time of year. I am told that the female mates with a different male to the one of the first brood.
It seems that we have yet another new species record for the Country Park. Closterotomus norwegicus aka the Potato Capsid. This belongs to a large group of bugs collectively known as Mirid or Plant bugs and although it is called the Potato Capsid, the excellent British Bugs website tells us that it feeds on a wide range of plants, especially nettles, composites and clovers. Found yesterday on the Firehills not far from the radar.
I have been keeping an eye on the birches where I first spotted the second instar nymphs and have managed to get a photo of final instar nymphs a week ago and today a number of adults. It seems that the adults photo is a little special as a couple of experienced recorders of shieldbugs have not seen adults crowded together thus on a leaf. I have only found one other similar photo on the internet so it would seem that not many people get to see this as the adults split up quickly it would seem and I am rather privileged to be one of those.
Also seen today 3rd and 4th instar Birch Shieldbug nymphs.