Yesterday I accompanied Bob to the old Hanson concrete plant to see how the area was developing, what was growing and what insects were around. On our way we popped in to Tern Hide where there was a common sandpiper foraging on the shore of Ibsley Water:
The old Hanson plant, now named by Bob as ‘the empty quarter’, does look rather barren. Most of the area has crushed concrete underfoot, but plants including St John’s wort, ragwort and lots of common centaury are growing, alongside grasses and the pioneer tree species silver birch, which is quick to colonise new habitats following disturbance and will need managing to ensure the saplings do not take over.
The Empty Quarter
The sandy looking area in the photo above was probably the most interesting as here there was less crushed concrete and an abundance of holes in the softer ground, evidence the area is being used by solitary bees and wasps. There is obviously enough flowering on this part of the reserve and the surrounding banks for the green-eyed flower bee below:
Green-eyed flower bee
There were lots of dowdy plume moths (identified later by Bob, who also discovered one of their favourite larval food plants is common centaury) and we also saw a species of leaf-cutter bee and a six-spot burnet moth:
Six-spot burnet moth
I haven’t set foot on this part of the reserve before so it was nice to get the opportunity to have a look and see how it is developing. For those of you who are regular, long-standing readers of the blog, please don’t ask about the footpath, there is still no news…
Elsewhere on the reserve I have seen my first cinnabar moth caterpillars, with their distinctive black and yellow stripes. Their bright colours are a warning to predators not to eat them: as they merrily munch their way through common ragwort, the toxins present inside the plant build up inside them, making them unpalatable to predators.
There are also plenty of gatekeeper butterflies on the wing, like this one enjoying the common fleabane in the sweep meadow:
When I emptied the moth traps this morning there were a couple of nice species inside, including a yellow-tail, coronet and a canary-shouldered thorn.
The highlight from the moth trap though was a hornet. Hornets are attracted to light, but are very docile first thing in the morning, taking a while to warm up and fly off. This one was quite content walking around the bench until it was ready to fly away, and it was nice to have a really good look at it up close:
Although hornets may get a bad press, they are much less aggressive than their smaller relative the common wasp and will only sting if attacked. They play an important role in pollination and are a gardener’s friend, helping control unwanted pests with their diet of insects.
Today has been a really good day for dragonflies, with common darter, emperor and brown hawker all on the wing over the ponds by the Education Centre. The common darters in particular have been posing nicely and letting you creep up quite close for a photo:
Today’s highlight though has to be the golden ringed dragonfly a visitor spotted over the ponds behind the Centre, with regular visitor John letting me know so I could take a photo:
Golden ringed dragonfly
This striking black dragonfly has yellow rings along the length of the abdomen, hence the name, and green eyes. The females are the longest dragonfly in the UK due to their long ovipositor which can reach 84mm in length. If they choose to rest they may stay in one place for some time and although present on the reserve (we sometimes catch their nymphs in the Dockens Water when river dipping, where they prefer flowing acidic water to still water) they are not quite as easy to see here as some of our other dragonfly species. It was a rather nice end to the day!