Butterfly Islands: July 2016

Wednesday, 27 July 2016

An Unexpected Treat.

After several visits to the Greek Islands and encountering the butterflies that are in the vicinity of our holiday homes,I have learnt to be aware that a 'blue' may not be just another Common Blue or a 'skipper'.just another Large or Small Skipper. This proved so following a trip to Lefkada at the end of May this year.In a nearby olive grove dispersed with wild flowers and long scrubby grasses there were many skippers busily buzzing about.If the opportunity presents itself, it is a good idea to take some photos just in case I have stumbled upon something more interesting than 'just another skipper'.

That is where I left it until thankfully a fellow butterfly enthusiast advised me that my skippers were Thymelicus acteon or the Lulworth Skipper as it is commonly called in the UK.This species is not widespread in Britain,in fact it only occurs along the south facing grassy cliffs of Dorset.In continental Euorpe however it is found throughout and tends to be more common in the south including the Balkans.

Friday, 22 July 2016

Small Blue Join the Summer Blues.

With very recent reports of a second generation of Small Blues on the mainland,I was very pleased to see several at Whiteways Quarry today. They were in the company of increasing numbers of Chalk-hill Blues,Common Blues,and Brown Argus.All were very active in the warm sunshine.

Wednesday, 20 July 2016

Back In Town.

The White-letter Hairstreak colony discovered last year on a disease resistant elm in Newport is still going strong. The first individual was spotted about two weeks ago and today several females were seen on the lower branches.This particular elm was planted around the time of the millennium and last season was the first time that any hairstreaks were recorded on the tree.

Sunday, 17 July 2016

Summertime Blues.

This typical British 'on-off' summer is perhaps on again, with my first sighting of a Chalk-hill Blue on West High Down today.In fact three males were spotted,two beside the track leading up to the Down and one actually on it.Of course this species can be very numerous here and I am sure that over the next few weeks hundreds,if not thousands,of this striking butterfly will be flying on our downland.

Thursday, 14 July 2016

A Repeat Performance.

While in my local copse today I encountered this Meadow Brown aberration.Funnily enough it was in the exact same location as another similar aberration of the same species from last year.An offspring perhaps.

The 2015 aberration can be viewed here.

Thursday, 7 July 2016

New Summer Sightings.

Three first of the year sightings were made yesterday.On West High Down the Dark Green Fritillaries are on the wing and flying at great speed,not taking time it seems to stop and settle.Two other sightings were that of a male Small Skipper on the Down and a fresh Gatekeeper in Walters Copse.Other butterflies now becoming numerous are Marbled White and Meadow Brown.

Friday, 1 July 2016

Sunshine At Last.

Two target species today were the White Admiral and the Marbled White.The former had already been seen in Bouldnor Forest a few days ago although I was yet to find my first Marbled White of the year.At last the sun was out today following a period of wet and windy weather.However, the wind has not abated and perhaps it had an effect on the butterflies as both species were flighty.Despite seeing several White Admirals none took the opportunity to feed on the abundant bamble flowers in the forest.The two Marbled Whites I encountered were just as jittery and I was lucky to catch any at rest.

Happily the Silver-washed Fritillaries were more accommodating and I managed to get good views of these handsome woodland butterflies.This included my first female of this summer seen basking in a sunny glade

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.