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for Ornithology (BTO) research suggests it could be related to the changing nesting behaviour of its hosts, plus a decline of available food (caterpillars). Cuckoos usually lay their eggs in the nests of dunnocks, meadow pipits, pied wagtails and reed warblers

Whilst out running in Peckham Rye Park earlier this week I noticed that the leaves of the horse chestnut trees are starting to show pale brown blotching all over. These are caused by the caterpillars of a minute moth, Cameraria ohridella - the horse

predators in the garden and they attack all manner of real pests including caterpillars, aphids and flies. They feed the chewed remains to their grubs back at the nest. The last five years have been really bad for wasps; either the hibernating queens have

, pinks and yellowy greens.The nondescript green or brown caterpillar feeds on a huge range of native and cultivated plants, but it's usually very secretive and never a pest. It was sitting in its distinctive pose: head down body slightly raised with its

in the region of 50 to 55 mm.In insects, small size is sometimes attributed to poor nutrition during the larval stage. Since painted lady caterpillars feed on thistles, food shortage seems unlikely...unless, perhaps, the recent poor weather meant that its

. Of course, when I took it down to the kitchen and forced it to sit on a large leaf, it refused to adopt a picturesque position.It has a delicate jaunty flutter, hopping this way, then that, through the air. According to my guides the caterpillars feed

of caterpillar droppings in the chewed-out core.I can imagine this might be very tiresome for the apple farmer, and not very pleasant on the tongue when biting into a nice juicy fruit. It bothers me less, because our apples are not actually very tasty. I

wildlife, they can be made into great plant food and are a surprisingly versatile ingredient in the kitchen.The nettle we're used to in the UK is Urtica dioica, a perennial plant full of iron, calcium, magnesium and nitrogen, which makes it incredibly

't grow cabbages so I'm not too worried. The caterpillars sometimes make a mess of the nasturtiums, but the plants are so vigorous by now that not even a mass attack could do much damage. I had a quick look and sure enough several leaves have clusters

in the long grass and herbage (away from flowers) for moth caterpillars in which to lay its eggs. This is the first time I've seen it in the garden. It sunned itself for a few seconds, then it was off.