Butterfly Recording Report 2020
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BUTTERFLY CONSERVATION LANCASHIRE BRANCH DEDICATED TO SAVING WILD BUTTERFLIES, MOTHS AND THEIR HABITATS Lancashire, Manchester and Merseyside Butterfly Recording Report 2020 Butterfly Conservation Registered in England 2206468 Registered Charity 254937 Laura Sivell Butterfly Conservation President Sir David Attenborough Registerd Office Manor Yard, East Lulworth, Wareham, Dorset BH20 5QP President Sir David Attenborough Head Office Manor Yard, East Lulworth, Wareham, Dorset BH205QP Head Office Manor Yard, East Lulworth, Registered in England 2206468 Tel 0870 7744309 Fax 0870 7706150 Registered Charity No 254397Wareham, Dorset BH20 5QP 01929 400209 Email: [email protected] Butterfly Recording Laura Sivell County Butterfly Recorder Please continue to send your butterfly records (remember, every little helps)to: Lancashire and Merseyside Laura Sivell, email [email protected]—note the change of email. Or by post to 22 Beaumont Place, Lancaster LA1 2EY. Phone 01524 69248. Please note that for records to be included in the annual report, the deadline is the end of February. Late records will still be used for the database, but once the report is written, I’m not going to update or rewrite on the basis of late records. The report is also going to have to be written earlier in the year, in February, as I’m full on with work in March/April and I just can’t do it! Greater Manchester These records should only go to Peter Hardy, 28 Hyde Grove, Sale, M33 7TE, email [email protected] - not to Laura Sivell. Some people have been sending their records to both, leading to a fair amount of wasted time in sorting out the duplicate records. Likewise Lancashire and Merseyside records should only go to Laura. Record Validation A few records that seem improbably out of area or outside the normal flight time have been omitted, or included but with a proviso. Of the Big Butterfly Count records, each record has been checked against a map and those records which were judged improbable - mainly of Common Blue in urban areas - were excluded along with the Marbled Whites. Inexperienced recorders can easily mistake a common from a Holly Blue which would be the likelier species in urban gardens. The New Recorded Squares Table The table now shows the percentage of the total number of squares recorded that showed each species. It should give more accurate trends for the more generalist and widespread species. It will show less change in the rarer species as all/most of these are covered by site transects on the specialised habitats in which they are found, which are going to be visited and counted no matter how many squares are recorded in total. Any change in the percentage of those is going to be partly down to total recording effort, and partly down to trends within the species. The 2020 Butterfly Season A good start with a record-setting warm, dry spring leading to drought conditions for some spring species , a rather wet June and July, and August quite unsettled. Nationally, the sunshine was lower than average in June July and August (according to Radio 4). Included in this report are some new charts of flight periods, which the new version of Levana (the mapping programme) can do. It can do bar charts or line graphs—could anyone that has a preference let me know? Some of the colours in the bar charts look a bit dim to me, and there’s no facility for altering them. All Sections 2,600 Most transects were not done All -butterflies+others input completely due to the lockdowns, 2,400 None 2,200 Gait Barrows Wardens, all species or at all. Gait Barrows was done 2,000 more or less fully, with a few 1,800 missed weeks—but when you look 1,600 at the low numbers that were seen, 1,400 it’s a very sad picture for a once 1,200 1,000 wonderful site. Counted Number Total 800 Generally, numbers of records are 600 down as would be expected when 400 we were not allowed to go out. 200 0 The chart opposite shows that the 1994 1996 1998 2000 2002 2004 2006 2008 2010 2012 2014 2016 2018 2020 number of recorded squares in Year total was fewer than usual, and high counts were well down across the board., see page 5. The only species that held up their [proportion of recorded squares were those that only occupy a very limited number at the best of times, that people make an effort to visit. Cover Photo Ivan Lynas, Common Blue at Yarrow Valley Park 2 0 0 0 0 3 0 22 56 39 0.3 8.5 1.3 0.1 3.1 2.8 0.8 0.7 5.2 0.2 4.5 0.8 794 46.8 37.4 62.5 64.2 20.2 56.4 15.4 17.2 21.2 36.3 37.2 64.4 55.9 19.1 15.1 16.1 2020 0 8 25 21 21 0.3 7.2 1.4 0.1 3.4 1.5 0.1 0.1 0.5 0.2 0.6 4.1 0.2 4.8 0.7 0.7 894 26.1 50.7 48.5 59.6 52.5 75.8 67.6 79.3 68.9 25.2 34.6 46.4 70.8 56.9 18.2 24.2 2019 0 3 1 38 57 33 0.4 8.6 2.2 0.1 4.8 1.2 0.2 0.8 0.2 0.6 7.7 0.2 0.2 859 17.5 42.8 58.7 0.02 44.8 44.7 30.8 54.3 30.3 24.9 13.2 22.4 49.4 81.4 70.7 12.2 13.6 14.7 2018 0 3 0 45 51 17 26 0.2 5.3 1.4 1.2 0.2 0.4 0.5 0.2 0.5 8.8 2.4 0.2 3.8 0.1 0.6 744 17.2 34.9 49.7 50.8 41.9 25.8 72.4 20.2 12.7 43.8 56.5 47.8 13.1 19.3 18.4 2017 0 15 51 0.2 9.7 2.5 0.1 5.3 2.4 0.5 0.8 1.1 0.2 0.4 1.4 7.7 3.2 0.2 3.5 1.4 698 44.4 32.3 54.5 34.6 43.1 54.5 30.5 45.2 16.6 18.6 11.4 30.3 39.3 47.4 15.4 18.7 19.6 2016 0 0 36 27 29 0.3 9.4 1.6 0.1 4.9 1.8 0.5 0.6 0.7 0.3 0.9 2.4 3.8 0.6 0.9 774 17.3 53.8 42.7 52.9 48.9 59.4 48.1 17.8 18.4 16.1 11.1 24.8 34.7 45.2 41.9 16.6 26.6 2015 0 3 0 2 24 0.3 1.6 0.2 8.3 1.5 0.5 0.3 0.7 0.2 0.8 8.9 4.4 1.2 794 11.8 13.6 49.8 37.1 57.5 33.2 67.5 62.9 14.6 55.1 15.3 21.4 29.8 48.4 54.1 44.7 16.7 26.8 28.4 2014 6 0 0 25 33 0.3 8.4 2.8 0.1 3.3 0.9 0.5 0.9 0.1 9.2 1.1 5.8 3.7 4.1 0.5 1.5 554 10.1 43.9 45.4 32.6 52.8 60.3 10.3 18.6 22.4 33.2 46.7 50.1 48.1 10.7 23.2 28.3 2013 4 7 2 0 5 0 9 0 27 17 19 0.4 9.3 3.8 0.2 1.5 1.1 1.1 0.4 1.5 4.7 3.6 3.8 2.2 476 Recorded 2 km squares 40.6 28.1 45.5 54.5 63.4 25.4 18.8 16.8 32.5 44.8 36.8 34.3 22.7 2012 0 0 7 19 10 16 2.6 2.2 4.1 0.3 5.5 3.7 1.8 1.8 2.6 7.8 1.1 2.6 4.4 3.7 1.1 3.7 479 12.3 31.7 21.2 36.1 26.4 39.9 49.6 47.3 15.2 23.1 28.7 28.7 31.3 32.4 11.1 2011 2 0 0 11 32 25 0.5 1.9 0.1 8.7 2.2 1.5 0.5 1.1 0.3 1.1 4.7 4.3 5.3 8.2 0.3 1.4 524 42.1 26.1 51.9 51.3 53.4 11.6 35.1 15.2 21.9 29.7 45.2 40.6 36.2 20.2 16.4 2010 8 1 0 1 0 45 13 0.3 2.3 2.7 0.1 9.3 3.2 1.6 0.7 0.3 3.2 3.4 4.7 9.1 2.7 1.4 546 39.3 18.8 49.2 31.5 46.1 39.7 57.5 13.9 13.3 26.1 39.7 41.2 52.5 14.8 16.6 2009 2 0 0 6 0.4 7.8 2.9 2.4 0.2 7.8 1.7 1.3 1.7 5.8 0.4 1.5 1.7 3.5 0.2 1.7 - 447 40.9 23.9 56.5 29.7 42.4 35.5 36.4 30.4 14.3 12.5 28.8 36.4 40.4 49.6 10.7 13.8 15.4 as a percentage of the total number squaresof in which recordings were made.