Francis Hickenbottom’s Nature Notes.

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30th November 2011

Sycamore leaf with tar-spot disease.

I was all set to do some watercolour pictures of sycamore leaves a few days ago when I saw that the first gales of the winter were due. On time, the winds arrived and stripped many leaves from the trees but they left plenty of the sycamore leaves that I was interested in.

Every autumn, I like to see the spotted sycamore leaves which result from the tar-spot fungus, Rhytisma acerinum. This fungus does not cause significant harm to the sycamores but produces attractive patterns when its black spore-producing organs form. The leaves lie on the ground during winter and spores are released in spring to infect new leaves.

After a slow start, following the relatively dry summer, fungi started to be seen in the grounds of Ackworth School a week or two ago. In the usual spot, shaggy ink-caps appeared and are still emerging. Also, on the large stump of an elm tree, dozens of glistening ink-caps (Coprinus micaceus) grew and are now decaying.

There is bad news concerning the local barn owls, only about a month after I was alerted to the occupation, by a pair, of an old barn near the school. I was driving a minibus full of students back to Ackworth late one Saturday evening when I spotted a barn owl by the main road, about a mile outside Ackworth. I returned the next morning and found that the skull of the owl had been shattered by the bird’s impact with a car. Only a day or two later, I was told about another dead barn owl by another of the roads just outside the village. I can’t know the origin of the owls but it is ominous to hear that no noise has been heard from the barn recently.

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