Butterfly Islands

Saturday, 2 June 2018

Glanvilles Take Over the Slopes.

It is now three weeks since the first adult Glanville Fritillary was reported on the the Isle of Wight.Today on the landslip close to Compton Chine the Glanvilles were out in force despite the seafog rolling in and cooling down the temperatures.In cloudy weather the butterflies tend to snuggle down in the long grass but there were still plenty to see nectaring on the thrift and ribwort plantain.It certainly looks like another good year for this butterfly and encouraging are sightings made in the east of the Island.

Thursday, 31 May 2018

Back on the Road to Paliokatouna.

The road from Nydri to the hillside village of Paliokatuna on the Greek Island of Lefkada is about 3kms.This quiet road passes olive groves and several private villas as it winds up to the village and beyond.I have made a point of exploring the groves and small meadows beside the road ever since staying at Paliokatouna some years ago. and enjoying the wildlife that inhabit the hillsides.

I was happy to see for the first time,a Large Wall Brown fluttering around the side of the road nectaring on scabious flowers.It wasn't long before an impressive Scarce Swallowtail showed up,taking an interest in the many villa garden flowers that straddle the wire fences along the road. This was followed by a Southern White Admiral with the same intention.The surrounding olive groves are home to drifts of wild flowers and consquently many small butterflies.These include skippers and Common Blues.Another butterfly attracted to this mass of nectar are Clouded Yellows and there is always one it seems to be seen in any direction.

The Adonis Blue

The Large Tortoiseshell

It seems the general view on the status of the Large Tortoiseshell in Britain is that it is now extinct as a breeding butterfly.
It is a butterfly of woodland edges and hedgerows that abound in willows,elms,and poplars.These trees are used by the adult to lay its eggs and this single brood appears in July and August.The emerging butterfly then hibernates over the winter in log piles and hollow trees until the next spring.
On the Isle of Wight sightings are more often than not made from early March to April.Have these butterflies overwintered on the Island or have they come from the continent where it is common?
Any sightings made in July/August pose the same question.Another explanation could be that captive-bred releases are responsible.Only the discovery of eggs and caterpillars will probably answer these questions.

I can now report that evidence has been found of breeding just along the coast at Portland in Dorset (June 2020) and again at the same location in the summer of 2021.

The Glanville Fritillary

This elegant butterfly is mainly confined to the crumbling undercliffs and chalk downs of the Isle of Wight.It is also found on the Channel Islands and at one or two isolated colonies on the British mainland.In Britain the Glanville Fritillary is at the extreme north-western edge of its range.On the continent it is readily found in flowery habitats.
Around the southern shores of the Isle of Wight the cliffs constantly erode causing them to slip away and provide perfect conditions for new growths of the butterflies laval host plant,Ribwort Plantain.
The eggs are laid to the underside of the leaves of this plant and normally hatch after about three weeks.The resulting caterpillars live together in communal webs spun over the plantain.In the autumn they hibernate and recommence feeding in the spring,eventually dispersing to prepare for pupation.
The adult butterfly is on the wing from May to the end of June with the female being larger than the male.They will feed on,amongst other things, Birds-foot Trefoil and Thrift.

The Wall Brown

On the Isle of Wight in particular,the Wall Brown is a butterfly of field edges,coastal cliffs and dunes,and rabbit-grazed downland.
The male is territorial and spends much of the time patrolling and basking on the ground.
The female,which lacks the males conspicuous dark sex brand across the forewings,is larger.The undersides of both sexes are beautifully cryptic when at rest.
The Wall Brown generally produces two broods a year,the first from late April until late June and the second from mid-July to mid-September.