Butterfly Islands

Tuesday, 20 June 2017

Early Return for White-letter Hairstreaks.

This year the season seems to be at least two weeks early and many of the summer species are on the wing sooner than expected. The White-letter Hairstreak is no exception as normally they would not be seen until July.

At Newport the colony of White-letter Hairstreaks were counted in almost double figures and it is pleasing to know that this is the third year in succession that they have been recorded here.The photo below shows the disease resistant elm ( the smaller tree on the right) where these butterflies have made their home.Unlike many sites where it is normal to gaze up at the Hairstreaks from ground level the adjoining foot bridge gives an excellent vantage point.

Saturday, 17 June 2017

Butterflies Out in the Hot & Sunny Weather

A walk in Bouldnor Forest near Yarmouth yesterday produced four first sightings of the year The hot and sunny weather continues and the butterflies certainly responded with plenty of butterflies on show.Apart from several species already seen this season, new sightings were White Admiral,Marbled White,Large Skipper,and Ringlet.

Other sightings included Silver-washed Fritillary,numerous Meadow Brown and Common Blue,and a Grizzled Skipper.

Tuesday, 13 June 2017

First Silver-washed Fritillary.

A wander along the wooded rides of Firestone Copse,at Wootton today resulted in my first high summer butterfly.A male Silver-washed Fritillary glided past me and landed at a nearby mud-hole where he proceeded to take the waters.Unfortunately there was no sign as yet, of that other majestic woodland butterfly the White Admiral.

Monday, 22 May 2017

A Splash of Colour.

With settled and warm weather a definite prospect for the next few days the season is well under way.Today the pyracantha bush in the garden looked magnificent as a deluge of flowers began to open.This attracted my first Painted Lady of the year,a very pristine individual.Despite my attention it returned several times to take advantage of the blooms and that glimpse of orange and red on the underside plus the gold and blue of the underside rings was an enjoyable treat.

Yesterday while on the cliffs and landslip of our southwest coast I came across a Small Copper sporting several blue iridescent pear shaped spots on the hind wings.This is the aberration caeruleopunctata,not an uncommon form but it can vary from having one or two faint spots through to five clearly defined pear-shaped marking on each hind wing.

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.