Butterfly Islands: July 2014

Wednesday, 30 July 2014

As Beautiful as a Butterfly.

The Jersey Tiger Moth is certainly a colourful moth and today this one was seen in my garden on the Phlox blooms.I have been fortunate enough to see three in the garden over the last week.

Wednesday, 16 July 2014

I hoped that the Graylings were out on Bleak Down by now and made the walk to their usual site on the Down.The area is one of the few remaining stretches of heathland on the Island and with the heather now in flower it makes a colourful sight.After some time of searching I at last found a Grayling. Obviously I was somewhat early to see the colony, so hopefully in another week numbers will have substantially increased.
2017 update. A visit to this site today the 5th August discovered no Graylings. The area of past activity has now been overgrown with grasses and although flowering heather still remains in places, there is no bare open ground.

Friday, 11 July 2014

Summertime.

A very warm and sunny morning at Walters Copse today and it was not long before I came across a pristine Painted Lady butterfly.Not too far down the path and a Dark Green Fritillary was also feeding on the giant thistles.This fritillary can be found in our woodland as well as on our chalk downland.

Now good to see reasonable numbers of Marbled White,Meadow Brown,and Ringlet in the copse.Not many Silver-washed Fritillaries though and no sign of any Valezina as yet.The normal females however are in evidence seeking out egg laying sites at the base of oak trees.

Thursday, 10 July 2014

Chalk-hill Blues Now On Show.

Several Chalk-hill Blues on West High Down today blown along on a very stiff wind.Hopefully in a few days numbers will steadily increase and reach last years staggering totals.More Dark Green Fritillaries now on the wing. all nectaring on the abundant flowering plants on our Downs.

Wednesday, 9 July 2014

Thymelicus sylvestris or Thymelicus lineola.

Today at Wheelers Bay both Essex and Small Skippers were to be seen sharing the same habitat at the foot of the cliffs.

These two species are very similar and apparently there are several minor differences which will enable the observer to tell one from the other.I prefer to take a close look at the antennae,as the Essex has a distinctive black tip on both whereas the Small Skipper has mainly dull brown-orange tips.On the Essex the black extends to underside of the antenna tips.

This difference can be seen (I hope) in the following photos taken today of the butterflies at the Bay.The first two examples are of an Essex and the last two a Small Skipper

Friday, 4 July 2014

Still Waiting.

A hike up to West High Down this morning in the hope of seeing my first Chalk-hill Blue of the year.I was to be disappointed as despite a good search it did not seem that any had emerged,at least on this part of the down.

I did see a new species for this season though,a male Gatekeeper sheltering low down in the gorse away from the stiff breeze.Many more Marbled Whites now and one or two of the Dark Green Fritillaries are starting to look somewhat faded.

Wednesday, 2 July 2014

Still Around.

A surprise sighting yesterday at Shepherds Chine on the Islands' south west coast was a late Glanville Fritillary. The first sighting was back on 29th April and normally one would not expect to see it in July.

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.