Meadow Secrets - The Wildlife Trusts
Transcription
Meadow Secrets - The Wildlife Trusts
DISCOVER OUR MEADOWS SECRETS W hichever it is, summer is by far the best time of year for exploring your local meadow. Now wildflowers are blooming, butterflies are on the wing, grasshoppers are singing and birds are raising young. In most of the UK, meadows came about through people felling forests thousands of years ago, and subsequently grazing livestock over many centuries. Meadows are what scientists call a plagioclimax: a habitat maintained – and prevented from becoming something else – by the activity of humans and their livestock. As meadows are more open than woods they generally favour sun-loving species of flower and invertebrate. Since these habitats were largely shaped by centuries of grazing, conservation organisations continue the same management today. Meadows are therefore also great places to look for our tough native breeds of sheep, cattle and horses. Park Gate Down, Kent WT (c) Jim Higham Wherever you live in the UK, there is a meadow near you. It might be a an upland fell or dale, a coastal dune slack, a river valley water-meadow, a patch of waste ground on the edge of town, or a priceless chalk grassland nature reserve. DISCOVER OUR MEADOWS SECRETS 10 MEADOW SECRETS (c) Margaret Holland (c) Meul / ARCO (naturepl) Yellow meadow ant 1 Meadows and grassland are full of attentiongrabbing insects in summer – bright blue butterflies, burnished burnet moths and rattling grasshoppers – but how many of us look for the tiny ones which toil under the soil’s surface? One such, which is found in lowland grassland all over the UK, is the yellow meadow ant. This little ant lives in colonies of thousands of females, whose burrowing through the topsoil in search of their minute invertebrate prey tills the soil and aerates it. The yellow meadow ant also contributes to the conservation of one of the loveliest butterflies of our southern chalk grasslands. Worker ants are attracted by volatile chemical released by caterpillars of the chalkhill blue and often take the caterpillars underground, keeping them safe as they develop. Meadow pipit 2 The little meadow pipit makes a virtue of being nondescript. It has neither the buttercup crown of the yellowhammer, nor the carmine blush of the linnet’s breast, nor even the free-wheeling song of the skylark: it is simply a plain olive bird with a slim bill and black streaks on its pale breast and flanks. But the meadow pipit is one of the commonest and most characteristic birds of rough grassland all over the UK. In early summer male meadow pipits sit on fenceposts and low bushes, giving their strident, pulsing songs, and are often moved to launch into exuberant parachuting song-flights. DISCOVER OUR MEADOWS SECRETS 10 MEADOW SECRETS (c)Philip Precey (c)Bruce Shortland Bush-crickets 3 Some wildlife is best found by sound. Bushcrickets are related to grasshoppers, though they have much longer antennae. Several species live in UK meadows, including two which have recently colonised large areas of the country. In the late twentieth century both Roesel’s bush-cricket (pictured) and the long-winged conehead exploded across the southern UK and they are still spreading. They are the ultimate kids’ insects as, without the aid of a bat-detector, their whining late summer songs (made by rubbing their wings together) are inaudible to most adults. Once heard, the next challenge is to locate the green insect in the long grass without scaring it into falling silent. Groundhoppers 4 Though also related to grasshoppers, the tiny groundhoppers are not known to make any noise at all. Like grasshoppers, their antennae are short and forward-pointing. Groundhoppers differ from grasshoppers in that the roof-like shield which covers the thorax (known as the pronotum) extends the whole length of the insect’s body. These minute hoppers favour bare, sunny places in grassland, very often muddy places close to water and, unlike grasshoppers which only overwinter as eggs, they live as young adults through the winter. Two species, the common and slender groundhoppers (pictured), are widespread in the UK, though it takes sharp eyes to find them. DISCOVER OUR MEADOWS SECRETS 10 MEADOW SECRETS (c) Geoff Simpson (naturepl) (c) Jon Hawkins Rabbit 5 Everyone knows about rabbits. Everyone sees them all the time. But do we stop to look at rabbits and their fascinating behaviour? Though introduced to the UK, they have lived in many habitats here for at least a thousand years and are instrumental in maintaining several of our grassland habitats. Rabbits are social, matriarchal, territorial, fastbreeding and highly attractive to predators such as stoats, polecats and foxes. What’s more, in summer their little youngsters are making their first forays into the world, so there is always something to watch at a rabbit colony. If only we took the time to watch them. Common twayblade 6 June meadows froth with brightly coloured flowers, each demanding the observer’s attention. Among the most dramatic are the numerous orchids which flower now: purple spires of marsh and spotted orchids in damp meadows and the enamelled buttons of bee orchids in sandy grassland. But everyone knows those; so why not look for an overlooked orchid? Try to find the pale green blooms of a common twayblade, each flower on the spike shaped like a tiny man in a huge hood. You’ll know you’ve found a twayblade because of the two broad, oval leaves from which it gets its name. It’s a common but neglected species in grassland all over the UK. DISCOVER OUR MEADOWS SECRETS 10 MEADOW SECRETS (c) Richard Bowler (c) Robert Thompson (naturepl) Mother Shipton 7 Meadows are great habitat for many species of moth. Among the most widespread and the most delicately patterned is the Mother Shipton, so called because its pattern of cream and brown squiggles is said to resemble the mysterious but famously ugly sixteenth century prophetess of the same name. The lovely adult moth flies by day in May and June, in many types of meadow all over the UK’s lowlands. Its caterpillars, also brown and cream, feed during the summer on clovers and grasses. Yellow dung fly 8 Where there is a meadow in the UK it is most likely that, thousands of years ago, forest was felled and subsequently livestock has been grazed. Meadows are kept open to this day by grazing livestock and where there are grazing animals, especially cattle, there is sure to be plenty of dung. Where there is dung there will be organisms that eat it. In summer meadows one conspicuous insect on cow pats is the yellow dung fly. It is the bright yellow males which spend most time on the dung, waiting both for females and for the other insects on which they prey. Once mated a brownish female lays her many eggs, like tiny white scales, on the dung, on which the larvae will feed. DISCOVER OUR MEADOWS SECRETS 10 MEADOW SECRETS (c) Elliott Neep (c) Carl Wright Shrews 9 The feistiest of the UK’s mammals, shrews are secretive and difficult to see. However, like bushcrickets they are easily heard by young ears as they bicker over territory in the long grass. Three shrew species are found in the mainland UK, two of which – common (pictured) and pygmy – can be abundant in meadows. These tiny insectivores do everything fast: they rarely live longer than a year, but may have two or three litters of half-a-dozen young, which themselves are independent when just a month old. Though their fizzy squeaks are readily heard, almost the only way to see shrews is to take part in a live-trapping event run by a licensed small mammal trapper. Grasses 10 Meadows and grassland are – who would have thought it? – dominated by grasses. Yet, somehow we ignore the grass; preferring to look at the pretty flowers or the brightly-coloured butterflies which live with them. This summer why not look at the grass too. It’s no surprise that in grassland there are many species; indeed wherever you are in the UK there are species which define your local grassland type. So get out and look for the slender foxtails of timothy grass, the bristly heads of cock’s-foot, the shiny green leaves of ryegrass and many local rarities. (Pictured - meadow foxtail).