Anyone who uses Google will probably have seen the ‘First Day of Summer’ cartoon on the search engine today, but alas it is actually wrong. The Summer Solstice is actually happening at precisely 11.34 pm tonight (10.34 pm GMT/UT) so tomorrow will in fact be the first day of the astronomical summer, and to be honest, summer weather really does only reliably begin with the Summer Solstice. This year is coincides with a Full Moon, so expect high tides. Typically cloudy weather is accompanying the Solstice Full Moon. This can be due to tidal forces, but also pollen dust, which acts like regular dust and attracts moisture in the atmosphere. And there are plenty of summer visitors arriving, such as the much watched for Painted Lady butterfly (Vanessa cardui), which I have seen occasionally in the last two weeks. Here’s one of the only good photos I got:
And there are many other exotic insects about, including one which I have only seen twice before, the stunning Wasp Beetle (Clytus arietis), which is as large as a wasp, but completely harmless. You will see these beetles on hedgerows and along, verges, in fields and even gardens:
However, ironically some harmless-looking insects can be a little bit harmful – almost all children know the Hairy Molly, a large hairy caterpillar which is often seen walking along sunlit paths and roads without a care in the world at this time of the year. In England they are known as Woolly Bears. The reason they are so unafraid is that they are bristling with poisonous hairs, which irritate the skin and lungs of some people, fortunately not me, as you can tell from this photo:
As for the adult this caterpillar will turn into – it’s a moth, and one of the most beautiful moths you are ever likely to see, the Garden Tiger (Arctia caja). I’ve only seen the moth twice before, but since there are many, many Hairy Molly caterpillars around, there must be many moths too, in the depth of the summer nights.