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Barnack

Barnack Hills and Holes, Butterflies and Rare Wildflowers

 

Where is Barnack?

Situated on the B1443 in the village of Barnack 4 miles south of Stamford Lincolnshire, Barnack Hills and Holes is a unique landscape managed as a nature reserve and a site of Special Scientific Interest (SSSI).

What Created the Hills and Holes?

It was created from the quarrying of limestone. The limestone taken from the site is known as Barnack rag and was formed from tiny sea creatures in the Jurassic period 150 million years ago.

Common Blue Butterfly - on Knapweed

Common Blue Butterfly – on Knapweed seed pod

Why is Barnack so unique?

Barnack’s unique Calcareous grassland supports over 300 varieties of wildflower which include 8 species of Wild Orchid.

The wild Pasque flower and the unusual Knapweed Broomrape, are just two of the more rare species to be found, as well as many slightly more common plants like cowslips, Violets, and a wide range of lime loving plants like Rock-rose, Wild Thyme and Ox-eye Daisy.

Pasque flower (Pulsatilla vulgaris) rare British wildflower

Pasque flower (Pulsatilla vulgaris) seen on the limestone grassland from April into May

When was the area Protected?

In 2002 the Hills and Holes became a Special Area for Conservation (SAC), to protect the wildlife, wild flowers and orchid rich grass land. The site is managed by Natural England who carefully maintain and improve the habitat in the reserve.

For more information visit

www.naturalengland.org.uk

View of Barnack Hills and Holes wildflowers

View of Barnack Hills and Holes wildflowers

The hills that we see today are the heaps of rubble left behind when all the useful limestone had been removed and the site abandoned in the 1500s, over time these heaps have become covered in the grasses and wild flowers that we see today.

Early Purple Orchid (Orchis mascula) at Barnack Hills and Holes

Early Purple Orchid (Orchis mascula)

The rich flora supports a wide variety of insects, a number of which are nationally scarce, including several species of rare butterflies, the Chalkhill Blue, Marbled White, Brown Argus and Green Hairstreak, as well a some of the more well known ones such as the Meadow Brown, Small Heath and Common Blue Butterfly.

Knapweed Broomrape (Orobanche elatior) flowering

Knapweed Broomrape (Orobanche elatior)

© Urban Butterfly Garden 2010-2024

Common Rock-Rose (halianthemum nummularium)

 

A bright yellow wildflower found in calcareous (alkaline) soils on well drained grassland, fairly common and widespread where soil conditions are right in the south and East of England, but becoming less common further North.

The five petaled yellow flowers appear May-September, around 15-25mm in size often in clusters.

The Common Rock-rose, provides a good nectar source for Bees and other insects, it is also a primary larval food-plant for the Brown Argus, Green Hairstreak, Northern Brown Argus, and Silver Studded-Blue Butterflies.

Quick Information

  • Group: Cistaceae.
  • Family: Rock-rose
  • Type: Perennial.
  • Height around: 50mm.
  • Habitat: Dry Grassland, Rocky areas.
  • Flowering: May to September.
  • Photograph right : shows open Rock Rose flower, flower buds and leaves
  • Photographed : 23rd May 2010.
  • Location : Barnack Hills and Holes (NNR)
Rock-rose (halianthemum nummularium) Wildflower with yellow flowers

Common Rock-rose (halianthemum nummularium) flower buds and leaves

  © Urban Butterfly Garden 2010-2024

Marbled White Butterfly (Melanargia galathea)

 

Found mainly in the southern half of the UK, in the Midlands and the south-west preferring the chalk and limestone grassland. Marbled white butterflies are usually seen flying from July-August, sometimes in large numbers emerging once a year in a single brood.

The Marbled White butterfly has distinctive black and white markings on the on the upper-wings, the male also has black markings the under-wings, in the female they are light brown. Both sexes have eye-spots on the underside of the hind-wings.

Marbled-White (Melanargia galathea)- Male showing underwings resting on Scabious

Marbled-White (Melanargia galathea)- Male showing underwings

Quick Info

  • Name: Marbled White (Melanargia galathea)
  • Family Group: Nymphalidae, Browns.
  • Flight Period: July-August.
  • Habitat: Chalk or limestone soils with flower rich Grassy Slopes, Meadows, Roadsides Verges.
  • Adult nectar plants: Brambles, Common Ragwort, Thistles, Knapweed and others.
  • Caterpillar feeds on: Grasses like Sheep’s Fescue, Cocksfoot and others
  • Wingspan: around 50mm
  • Photographed: – 4th and 5th July 14
  • Location: Barnack Hills and Holes.
Marbled White Butterfly (Melanargia galathea) wings open rested on knapweed

Marbled White (Melanargia galathea)Butterfly wings open

Flighty and active on bright sunny days, the Males are always busy searching for newly emerging females, breifly resting to take nectar from Brambles, Ragwort Thistles or Knapweed, their distinctive colouration makes these butterflies visible even in flight, making them stand out from some distance.

During broken sunshine they may be seen more leisurely, resting on tall stems of grasses or nectaring from wildflowers, although they will quickly take flight if disturbed.

Marbled-White Butterfly- Female showing underwings resting on Knapweed

Marbled-White (Melanargia galathea) Butterfly- Female showing underwings

© Urban Butterfly Garden 2010-2024