Timing

Timing is very critical for our wildlife. Leaf miners need leaves which contain enough fresh green matter to keep them fed until they mature, so they can only exist in summer. Flowers need flying pollinators to transfer pollen from one plant to the next. Birds need caterpillars to feed their young. Sawflies need fresh leaves for their larvae to feed on. Frogs need warm water for their tadpoles to develop. Parasites need their target species to be present before they can be parasitised. All species need their pre-requisites to be in place in order to feed/pupate/hibernate/survive.

Some of these timings are pretty relaxed. For example a bird can find larvae of suitable species for all of the breeding season, which might be all of 6 months long. But other timings are much more critical. If you consider that many mushrooms exist for only a few days, then any dependant larvae must grow from egg to maturity in that same short timeframe. Taking that further, any parasite that needs the larva to be present must also be around during those few short days: their opportunity to parasitise might be as short as 2 or 3 days in a year. Synchronisation is crucial.

When I was considering all of this, I noticed a specimen of Lawyers Wig - Coprinus comatus - on my lawn. I know that these tend to last perhaps 48 hours at a maximum, so I thought I would try to capture the life and death of this specimen over time.

I set up a platform for the camera and took shots every 2 hours. Sadly, the days are very short now, so I didn't get as many shots as I wanted. I should also point out that lying in very wet grass for even short periods is not a pleasant experience.

This is the shot at 11am:

By 2 pm. things had moved on a little:

And by 4 pm the light was fading and I got this shot:

Next morning only the stipe (stem) was left.

The Coprinus family of fungi reproduce by liquidising the spore-bearing gills, dropping the spores very locally (and very quickly). This is a double-edged sword: the spores don't get distributed very far, but there is also very little time for a hungry larva to consume any of the spores.

Timing is again of interest in this shot of the December Moth:

December Moth

I took this shot on 16th November, which is two weeks before December. It is well documented that this moth now appears from late October until January, but it must have originally been named December Moth for a good reason: it appeared in December. Phenology (the study of timings of appearances of species) shows that species are appearing at times which vary from the recordings when the species were named 2 or 3 hundred years ago. This applies mostly to plants and insects, but bird migrations are also changing. This variation in species timings is one of the reasons that global warming was detected: it might not tell us why we're warming up, but it certainly confirms that it's happening.

Brief sun

We had an unexpected clear blue sky today (I say 'unexpected' because I pay little heed to weather forecasts due to their consistent inaccuracy) so I took an early trip to see what was around.

The heat had certainly brought out more insects than I had expected to see in October, starting with this Buff Ermine moth caterpillar, which is coincidentally basking on the vacated mine of the micromoth Stigmella aurella on Bramble:

The caterpillar will shortly pupate and then hibernate until summer.

The 'Noon Fly' Mesembrina meridiana is never too numerous, but I saw at least eight on this trip:

The larvae of Mesembrina meridiana live in cow-dung and are predatory on other dung-dwelling larvae, including those of the Scathophaga Dung-Fly below:

Scathophaga are dung feeders as larvae, but are voracious predators as adults, a complete reversal from the Mesembrina which only feeds on nectar as an adult.

It would be good to get a 'full-circle' photo of an adult Scathophaga with a Mesembrina as its prey, although the Mesembrina tends to be a little large for the normal prey-size of the Scathophaga.

Just as I was finishing my little survey, a Speckled Wood butterfly flew over my shoulder and landed behind me:

It's amazing what a little sun will bring out.

Continuing the excellent fungal year, I found these 'Lawyer's Wigs' - Coprinus comatus - on my lawn. These only last for a day or two at most.

The visible, reproductive, parts of fungi are the familiar, short-lived, mushrooms or toadstools, but the actual fungus (the mycelium) lies below the soil or inside some other substrate such as wood or animal debris. This mycelium will last as long as conditions are right, which is why fungi are often found in precisely the same place from year to year. This specimen of Phaeolepiota aurea was also on my lawn, and in exactly the same place as last year. This rare fungus is thought to be a nettle associate (and I have nettles within a few metres of this specimen), but there must also be some other requirement, since the vast majority of nettle patches don't have the fungus.

September Sun

At last, after 4 months of rain, we have had some sunshine.

That should bring the fungi out: this is Coprinus comatus, or Lawyers Wig. Edible and good (and they were).

And now one of the tiniest of fungi: Marasmius hudsonii. These grow only on dead Holly leaves:


The close-up shows the thick gills and hairs on the cap, which is about 2mm. across:


The Willow Leaf Beetle - Lochmaea caprea is about 7mm long:


Moths are still coming to light in small numbers. This appears to be November Moth - Epirrita dilutata, but I'd better put an agg. on that to be on the safe side.


This is also a new species to me: Frosted Orange - Gortyna flavago.