Harlequin Ladybird Population Explosion
June 30th, 2009 | by lucy |

The Asian Harlequin ladybird (Harmonia axyridis) is capable of devouring over 12,000 aphids a year. This voracious appetite is why it was introduced to North America and then Europe, in order to protect crops as a “natural” pest control. Arriving in the UK in 2004, its numbers are set to increase dramatically this summer, predicted to provide hot and ideal breeding conditions. There is concern about the impact this will have on the 46 species of ladybird (Coccinellidae) native to Britain, but interestingly, local ladybird prasites are already adapting to prey on the interloper. A Harlequin Ladybird Survey has been set up to try and monitor the extent of the invasion, with an excellent website to help with the difficult task of identifying this variable insect.
Some possibly unrelated posts
The oldest osprey of the UK – and probably the world – has returned to her eyrie in the Scottish highlands. When she left for West Africa at the end of last summer, no one expected her to return. At 26 she’s lived 3 times longer than most female ospreys. In her life she’s laid 58 eggs and hatched 48 chicks, a massive individual contribution to the survival of ospreys in Scotland, where there are still only about 200 breeding pairs. The questions now are if her mate will return and if she is still fertile. Events can be followed on the 
Otters, water voles and fish are all benefitting from the improved quality of the UK’s waterways, now described as the cleanest since the industrial revolution. Since almost disappearing from the wild in the 1970s, otters are thriving, particularly in the south west of England, Cumbria and Northumberland. The population of water voles, highly precarious in the 1990s, is also beginning to recover. The good results of stricter pollution controls and extensive conservation work are set to continue in the new year with the introduction of new European water quality directives.











