The Weekly Photo Challenge – ‘Eye Spy’ – A Butterfly’s eye is a wonderful creation, their spherical compound eyes with almost 360 degree vision are able to detect threats from behind at the same time as focusing on nectar probing. Predators and camera wielding humans are all to be avoided. In common with many other insects, each eye comprises of up to 17,000 ommatidia – individual light receptors with their own microscopic lenses. Surrounding the eye and extending through the body are long hair like scales which give a furry appearance.
In late July and August our favourite spot to observe Chalk Hill Blues is Sharpenhoe Clappers, in the Chiltern Hills, managed by the National Trust, just a few miles from home. This species of Blue Butterfly is only found in the UK on southern Chalk Grassland Hills. The adults prefer a sunny sheltered south-facing spot for nectaring and roosting. Although this little Butterfly is not endangered, its habitat is diminishing. The caterpillars sole food plant is Horseshoe Vetch, only found growing on chalk grassland.
Sitting patiently waiting for Butterflies to land nearby and then staying to watch the sun go down with roosting Chalk Hill Blues alongside is quite a magical experience.