Butterflies Flutter At Glasswater Wood Near Crossgar

A Holly Blue butterfly at Glaswater wood. (photo by Bob Carter).
A Holly Blue butterfly at Glasswater wood. (photo by Bob Carter).

The seasonal beauty dazzled onlookers at Glasswater Wood1 in Crossgar over the bank holiday weekend, at an event jointly organised by the Woodland Trust and Butterfly Conservation Northern Ireland.

The Holly Blue was once a rare sight throughout Ireland, but has been expanding its range in recent years.

Rosie Irwin, the Woodland Trust’s new contracts manager, enthused: “We were absolutely delighted to find that Glasswater Wood is home to the Holly Blue. These butterflies thrive in sunny, sheltered sites, and are an indicator that the habitat is good for a range of other species.

“The Holly Blue’s caterpillars feed on a number of plants – including holly, bramble and ivy.  With a helping hand from Butterfly Conservation Northern Ireland and local people, we decided to give nature a helping hand and today we’ve planted around 30 holly trees here at Glasswater.”

“The Woodland Trust hopes that local people will be inspired to look out for the Holly Blue and other seasonal signs, including flowering hawthorn.  The charity’s Nature’s Calendar website is packed with tips on how to identify our best-loved species.  Have a look at:


Meanwhile budding butterfly enthusiasts can find out more at:


Fabulous Holly Blue facts:

*  The Holly Blue emerges well before the other blue butterflies in spring.

*  It flies high around bushes and trees, unlike other grassland blues which tend to stay near ground level.

*  Caterpillars are usually green, but some may be camouflaged with pink-coloured stripes.

*  Look out for the Holly Blue from mid-April until June.

*  The Holly Blue is easily confused with other blue butterflies.  Look out for its sky-blue upper-side wings, and powder-blue under-wings with small black spots.