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Helping to boost butterfly numbers
Butterflies have long been one of the prettiest visitors to the British garden, feeding on buddleia and other nectar-rich plants.
But the terrible summers of the last two years and the cold, wet weather in late spring and early summer have contributed to a reduction in numbers, according to the charity Butterfly Conservation, the world’s largest research institute for butterflies and moths.
“This spring could have been catastrophic for butterflies, because it means we will have had three really bad breeding seasons in a row,” says Dr Martin Warren, the charity’s chief executive.
“We have evidence that even common butterflies such as the small tortoiseshell are getting rarer. Almost three-quarters of UK butterfly species have decreased in population during the last decade.”
The weather in recent years has just exacerbated the situation, Warren continues.
“In 2010 and 2011, we had a bad July and August, as butterflies struggled to feed, fly and mate in the chilly conditions. The cold, wet weather in summer reduces their chances of survival.”
The charity is urging people take part in this year’s Big Butterfly Count, from July 14 to August 5, in which people record their sightings to provide the vital data which helps to determine how best to conserve the UK’s butterflies.
To enter, just find a sunny place and spend 15 minutes counting every butterfly seen and then submit sightings online at bigbutterflycount.org.
But it is also hoping that gardeners can help boost populations by encouraging a small patch of their garden to grow wild, so providing a vital haven for threatened species.
Leaving a patch of your garden wild doesn’t mean it will just be a mess, he says. Seeding it with herbs such as oregano, thyme and marjoram will not only provide rich nectar sources for butterflies, but will also be useful in the kitchen.
Buddleia has long been seen as the key species to attract colourful red admirals, peacocks and small tortoiseshells. But less showy plants such as clover, ivy and daisies provide caterpillars and butterflies with much-needed food and shelter.
Michaelmas daisies, including asters, lavender, the ice plant (Sedum spectabile), scabious and honesty, are all butterfly magnets.
Steer clear of ‘double flowers’ as they tend to produce much less nectar than single-flowered varieties. F1 hybrid plants also usually produce very little pollen.
Certainly this year’s garden shows so far, including Chelsea, have shown a move away from formal towards more natural planting with native species - and if we all follow suit, we may give the butterflies the boost they need.