Clearing the vegetation growing in front of the bug hotel a number of weeks ago has opened it up to a lot more sunlight, and as a result I noticed this week that the leaf-cutter bees have been busy and used one of the blocks of wood:
They will happily make their homes in solitary bee hotels positioned in a sunny spot, so our south facing bug hotel is ideal.
The females collect sections of leaf which they chew into a pulp and mix with saliva to create the walls of a cell for their offspring. Inside each cell she lays an egg and leaves it with a mixture of pollen and nectar on which to feed. The cells are then sealed up before she moves on to the next one, and finally she plugs the hole to the whole cavity with more leaf pulp. The young will develop over winter and emerge the following year.
I had a good look at the other blocks of wood the Young Naturalists had drilled holes in and added to the hotel and noticed another had four holes each with a solitary bee in it, the weather was not so nice so they were probably deciding whether or not to venture out. One did emerge from its hole, flew to a couple of bramble flowers then decided to fly back to the comfort of the wood.
As well as enjoying the comfort of the bug hotel the bees have been favouring the rather large thistle which has sprung up behind the Education Shelter.
Whilst by the bug hotel I spotted a couple of dark bush-crickets on the ground below:
Bush-crickets have very long thread-like antennae, compared to grasshoppers which have much shorter antennae.
When the sunshine has been out female emperor dragonflies have been busy ovipositing or egg-laying in the newer of the two ponds by the Education Centre. They can lay hundreds of eggs over their adult lives, in batches over a few days or weeks. The eggs are elongated in shape and laid into plant material on or near the surface of the water using a scythe-like ovipositor.
Whilst having lunch earlier in the week I was joined by a red admiral, which seemed very happy to settle on the gravel and let me get very close for a photo:
I also managed to get my first ever photo of a ruby-tailed wasp… but they do not hang around for long so it is a bit of a distant photo!
They are though very beautiful to look at, even if from a distance. Ruby-tailed wasps are also solitary, however instead of doing all the work themselves like the leaf-cutter bees mentioned above, the females lay their eggs in the nests of other solitary bees and wasps, favouring mason bees in particular. When the eggs hatch, they eat the larvae of the mason bees, giving the ruby-tailed wasp its other name of ‘Cuckoo Wasp’.
Parasitising other bees’ nests is risky, but the ruby-tailed wasp has a number of defences. It has a concave abdomen which allows it to curl up tightly into a ball and it has a hard body cuticle that protects it from the stings of the host species. They can sting themselves, but this sting is not venomous.
Recent highlights from the light trap have included this black arches and eyed hawk-moth:
The planters in front of the Centre are still attracting lots of bees including the green-eyed flower bees we have shared photos of in the past. Earlier in the week there was a tiny species of yellow-faced bee on the astrantia along with a sawfly of some description:
The mini meadow by the Welcome Hut is still good for butterflies when the sun has been shining, with four skippers dancing round each other earlier in the week. There have also been ringlet in the area of long grass and bramble by the boat, along with comma and red admiral on the wing fairly regularly. The gatekeepers are also now flying, the adults emerge slightly later in the season and are also known as hedge browns.