Brockadale  YWT


Site Details:

Recorders:   Paul + Joyce Simmons,  Les Driffield                    Distance:  2988m                       Altitude:  32m        Walk Time : 1 hour

Brockadale is located in the valley of the River Went as it flows through a craggy, steep-sided gorge formed after the last ice-age when glacial melt-water burst through the magnesian limestone ridge. Around 350 species of plants grow on the nature reserve. Early flowers such as cowslip, common dog-violet and spring cinquefoil, well suited to the limestone soil, can be seen in spring. Native plants such as rock-rose follow, as well as orchids, salad burnet, yellow-wort, betony, field scabious and, in August, a profusion of clustered bellflower. Butterflies abound in the meadows, with the spectacular Marbled White and Dark Green Fritillary are unmissable in July. Day-flying moths like Six-spot Burnet and Chimney Sweeper are common,  Silver washed Fritillary is now a common sight and both Purple and White-letter Hairstreaks can be seen. 


S1 starts from the car park westwards along the top of the hill with hedgerows as well as the meadow below  and has  very high counts of meadow brown and is a favourite with the Small Tortoiseshell.  S2 is just above the Horse  field in the process of being improved with lots of Small Tortoiseshells.  We enter the woodland S3  in a very quiet shady section frequented occasionally by Speckled Woods and   Silver --washed Fritillary.  S4 is a small meadow  in the middle of woodland which abounds with violets and is the home of the Dark-green fritillary and many Marbled Whites. S5 known as the  the butterfly ride is full lof Speckled Woods  and Ringlets and is a favourite with the Silver-washed Fritillary. S6 descends through the woodland  towards the valley with more Ringlets and Speckled Woods.  Section 7   valley bottom with damper  calcareous grassland stands out with huge numbers of Ringlet, Marbled  White, Peacocks and the other vanessids plus white but particularly  Brimstones and Gatekeeper. Brown argus also appears here asS7  S8 is intermediate scrub  before starting back up the slope of S9 and Common Blues appear in number. Holy Blue has been spotted  in S10


Results: 2022

A better year in 2022 . Small Skipper continues its slow decline as in many sites and is worrying. Large skpper was up on last year in most places by 30% and Brockadale is spot on. Brimstone was also up by a similar amout to teh rest of teh county.  green viened white and Orange tip  were about teh same which again is similar to the county with just smal changes but Large white in teh county was down 11% and -2 here so fairly similar.  It great to see Whiet letter hairstreak spotted on transect which is rare descending only in dire heat or lack of honeydew.  In Yorkshire Smal Copper was up a tad on last year but wel down longer term so great to see a good few here although their occurance tends to be sporadic.  Brown Argus on rockrose suffered very badly as here but boomed out on mineral soils on cranesbill  Common Blue suffered as well more so than other sites possibly due to drought on brockadale's chalk -5% across the county. Holy Blue was the same as last year which is quite different from other sites where it really boomed on teh spring generation.  The vanessids  overwintered really well  but were the real casualities in the heat and drought. Small Torts across the county were down -56%  as here . Peacock   did not suffer as badly here as elsewhere but Comma  universally boomed doubling in numbers on the summer generation. Dark green=Frits wer a bit down as again was pretyy universal and Silver washed were well up with a boom in teh county and much dispersal yet again.  Marbled white boomed but died off very quickly which masked a significant dispersal of thsi species popping up all over grasslands throughout much of the lowland grasslands The other browns also benefited somewhat but Gatekeaper really boomed.  Together the browns pushed the year total above last year despite the huge losses in the vanessids which is reflected in many localities 

Transect reports