It rained quite heavily overnight but was clearing as I arrived and I had a hope that it would, as we expect, clear in time for the volunteers work party. In fact it did and fifteen, more or less willing volunteers set off to start the annual task of controlling ragwort. On a site like Blashford on dry soils with a long history of disturbance total control will be impossible, the seed bank must be enormous and will last for tens if not hundreds of years. Despite this we do try to control growth along the boundaries where there is seen to be a problem with spread onto grazing land. Today we started on the western side of Ellingham Lake, the conditions were fine to start with but then deteriorated and suddenly the plants growing under the trees became the target of special effort. There was a short discussion about calling it a day, but Blashford volunteers are made of stern stuff and we carried on and then the rain stopped and we completed the whole length.
We walked back past Ellingham Inlet Pound, the very short vegetation around the eastern end has a lichen heath character, but includes some species not out on the main area of heath near Ivy Lake including one that was very striking in today’s dull light, the brilliant yellow biting stonecrop.
The rain returned for quite a bit off the afternoon and kept going right until the visiting school group left, when the sun came out! In the brief warm spell I noticed several tree bumblebee workers feeding at the flowers of the dark mullein near the Centre. The picture also highlights the amazing colour of the flowers.
The tree bumblebee is a recent colonist from the Continent and is now spreading rapidly northwards, last year we had a nest near the Centre in a bird box. On the same mullein plants there were also a few caterpillars of mullein moth, at this stage they seem to be eating the flowers rather than the leaves.
I had another good look at the common tern rafts again today and am now more or less certain that there are twenty-one pairs nesting now, sixteen with chicks and a further five late nesters on eggs. A good few of the chicks would be flying within a week, so it looks like it should be another good nesting season for them.