Butterfly Islands: Lang's Short-tailed Blue

Showing posts with label Lang's Short-tailed Blue. Show all posts

Tuesday 15 October 2019

October on Meganisi.

An opportunity to visit the Greek Island of Meganisi again this year could not be resisted, so last week I was able to stroll around the lanes close to the village of Spartochori in search of any late summer butterflies.Of course most species have finished their season but a few were to be found.Apart from the late summer regulars of Painted Lady,Clouded Yellow,Red Admiral,and Meadow Brown,the large flowering rosemary plants in the garden of our holiday villa were attracting Lang's Short-tailed Blue and Common Blue. Perhaps the highlight was the sight of several Sage Skipper's nectaring on the many flowering wild thyme dotted along the roadside.

Wednesday 23 November 2016

Favourite Find of 2016.

The 2016 butterfly season in the UK has been disappointing with sightings down on recent years.The results of The Big Butterfly Count can be viewed here.I have found this trend too on my forays around the Isle of Wight this year.A noticeable lack of butterfly numbers in the common species that I would expect to see doing well as our summer had good spells of warm,even hot weather.

I was pleased to see that the Newport town centre White-letter Hairstreaks were back on the elm tree where they were discovered in 2015.Along our southern seaside cliffs the Glanville Fritillaries seem to have had a good season too.

During my two visits to the Greek Islands in 2016 I had the treat of seeing several Lang's Short-tailed Blues and that import from South Africa,the Geranium Bronze which has now spread all along the Mediterranean coast from Spain to Greece.An unexpected sighting was a colony of Lulworth Skippers among the wild flowers of an olive grove on Greek Island of Lefkada.A rare butterfly in the UK,only seen on the coastal cliff tops of Dorset.

However my favourite find was during May when a trip was made across the Solent to the New Forest in Hampshire to see the beautiful Pearl-bordered Fritillary.Now alas,gone from the Island since 2011 due to a lack of sustainable habitat at its last location in Parkhurst Forest.The particular New Forest inclosure visited on that day was named New Copse and despite the rather cloudy weather there were good numbers of these fritillaries on the wing.The habitat here is well managed for the needs of the Pearl-bordered.

Friday 12 August 2016

A Busy Blue.

August is the month for a holiday to the Greek Islands and it was back to the Aegean Island of Thassos.Near to the resort of Scala Panagia there are many tracks that lead towards the mountains and along them plenty of chances to come across butterflies. One of the smallest but no less beautiful is the busy and sometimes elusive Lang's Short-tailed Blue.An African species and now resident in some parts of Greece.

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.