Bourneside Meadows

The landscape down towards Bourneside Meadow does not seem to have benefited from the small amounts of rain so far, and the whole area feels dry and almost devastated. The crop of forage beans have been sprayed with dessicant, and stand with blackened stems that rattle loudly against each other whenever Monty gets into them.

Alongside the crop margins there are lots of Prickly Sowthistle, Sonchus asper, mostly with white woolly seed (really cypsela) heads, and going over rapidly. Some of the old plants are heavily covered with a powdery mildew, and overall therefore even the weeds are struggling. Intriguingly there are young plants from earlier seeds already forming rosettes ready for the winter and flowering next year.

It was nice to see the first of a series of male Common Blue butterflies. Polyommatus icarus, as I turned off the track towards the meadow, and I think I saw a total of about 9 males altogether, with perhaps 3 females as well. This one is a male:

For the whole time I stayed within the meadow I didn't see any Brown Argus butterflies, Aricia agestes. However as I left, I did find four, all together in the very long grass alongside the river bank, trying to roost and settle on the grass stems and leaves being blown about by the wind. This communal roosting is characteristic behaviour of both this species and the Common Blue. The Brown Argus does seem to be give a much more silvery impression overall in flight, as well as perhaps being slightly smaller and narrower.

There were regular overflights from various white butterflies whilst I was at the meadow, and I did get close to one of them, which turned out to be a male Green-veined White, Pieris napi, nectaring on a Mint flowerhead. I know it was a male because it only had one dark spot on the upperside of the forewing, whilst females have two, and tend to have much darker forewings overall. It was nice to check the wing patterning, and the almost blue-greenish white hairs on and around the body. The hairs themselves might be white, but look blue-greenish just against the body.

The hairs extend around the abdomen, although this is not always so easily seen.

This butterfly on the other hand, seen later in the meadow nearer the river, was much more likely to be a male Small White, Pieris rapae, because of the lack of black triangular markings at the ends of the veins on the outer margin, although the overall upper wing pattern is very similar.

It was great to see the substantial clumps of Mint. The rounded terminal flowerheads and projecting stamens suggest that it is probably Water Mint, Mentha aquatica, supporting the generally wet nature of the ground around the large pond. The leaves were very hairy, not obviously petiolate on first glance (but they must have been, and this was confirmed on close examination), rounded with generally forwardly bluntly projecting teeth. The flowers were lilac, and a few mm in length with triangular calyx teeth as described in the books. Standard number of 4 stamens in the genus, with a central style and stigma, together with equal calyx teeth, (corolla and) calyx hairy on the outside in this species.