Tuesday 12 July 2016

Hunting the black bee

After travelling all over the UK for the last month, it's been nice to get back and about on the local patch. At The Lodge, some familiar summer wildlife is out and about, with lots of Meadow Browns fluttering though the grass, the striking longhorn beetle Rutpela maculata on the brambles, and the lovely wool-carder bees on the lamb's ear in the gardens.
Wool-carder Bee
Male Anthidium manicatum on lamb's ear
A near annual summer event at The Lodge, is the pursuit of the mysterious black bee. I first saw one of these in 2012, at which point it was assumed to be Andrena pilipes, a scarce and predominantly coastal species. It's since been mooted that it might actually be the much rarer Andrena nigrospina, but the two species are very difficult to distinguish. The fact that we've only ever seen the black beast in July, and never earlier in the year, might suggest that it's nigrospina, but we probably need some better evidence than that before we come to a firm conclusion. One thing that might help would be to find where they're nesting, as the form of Nomada fulvicornis which parasitises each species is apparently more distinctive than its hosts.

The first sighting of the year came last Monday, with a female heavily laden with pollen on a lovely flowering tree which I've somehow never noticed before. We'd actually been looking for clearwing moths using pheromone lures, but I'd got a bit distracted, first of all finding my second ever Melangyna cincta on some brambles, and then finally noticing the tree and the bees buzzing round it.
Andrena pilipes/nigrospina
The mysterious black bee
Melangyna cincta
Melangyna cincta
The following day we went round the old heath, where we didn't find any black bees, but we did find a rather nice black beetle. Last year the first Stictoleptura scutellata for the reserve, and possibly for Bedfordshire was found, and now one flew in from nowhere, and crashed into Col's neck before dropping to the sand and allowing itself to be photographed. With a supporting cast of the wasp mimicking hoverfly Chrysotoxum verralli, the dazzlingly green wasp Trichrysis cyanea and an obliging Cerceris rybyensis feeding on a forget-me-not, it was a productive lunchtime!

Stictoleptura scutellata
Stictoleptura scutellata
Chrysotoxum verralli
Chrysotoxum verralli
Trichrysis cyanea
Trichrysis cyanea
Cerceris rybyensis
Cerceris rybyensis
Later in the week we ventured onto the newer area of heath, and some promising areas of bare ground by the path quickly turned up the goods, with at least one heavily laden female bee looking like it was returning to a burrow - unfortunately it didn't find one, so we're still not completely sure where the nest site is. One thing that is definitely nesting in the bare sand is the wasp Tachysphex pompiliformis, which flew in carrying an impressively large grasshopper with which it will stock a burrow for its larvae.

Tachysphex pompiliformis
Tachysphex pompiliformis
That's almost all the wildlife for now, but at the weekend I dug out my clearwing lures, with a clear target in mind, given the poplar plantation that's just over the fence from my garden. I've looked for hornet clearwings at the base of poplars in the past, without any luck, so I was keen to see whether the lures could bring the moths to me. Within a few minutes I had my answer, a glorious male zipped up to the lure and gave it a thorough investigation before I netted it for a photo session a bit later in the day. I'm definitely a fan of being able to conjure such a fantastic beast out of thin air, I think the lures may be getting a few more outings over the next few weeks!

Hornet Clearwing
Hornet Clearwing
Hornet Clearwing
Hornet Clearwing, so good it deserves two photos