Butterfly First Sightings : Brimstone

This page shows the earliest sightings of the Brimstone in the Upper Thames region since 2004 (per UTB Recent Sightings data). The mean first sighting date of this species in the UTB region is 24th January. The "+- days" column shows the difference from the mean.
Date Recorder Location +- days
03-Jan-2026 Peter Cuss Warburg Reserve, Oxon -21 days
30-Jan-2025 Fiona Tchen Hampden Bottom, Bucks +6 days
24-Jan-2024 Geoff Sutton Lye Valley, Oxford, Oxon 0 days
04-Jan-2023 David Bainton Chesham, Bucks -20 days
04-Jan-2022 Peter Ogden Far Kingdom, Bucks -20 days
28-Jan-2021 Andy Hoskins Winslow, Bucks +4 days
09-Jan-2020 John Gibbings Bourne End, Bucks -15 days
25-Jan-2019 Dave Wilton Westcott, Bucks +1 day
18-Jan-2018 George Warner Upper Basildon, Berks -6 days
17-Feb-2017 John Whitworth Oxford, Oxon +24 days
04-Feb-2016 Chris Carter Alvescot, Oxon +11 days
09-Jan-2015 Ann Barrett Lower Brailes, Oxon -15 days
11-Jan-2014 Martin Kincaid Milton Keynes, Bucks -13 days
01-Jan-2013 Tom Stevenson Benson, Oxon -23 days
21-Jan-2012 Pim Young Homefield Wood, Bucks -3 days
08-Feb-2011 Chris Bottrell Kidlington, Oxon +15 days
01-Mar-2010 Mick & Wendy Campbell Warburg Reserve, Oxon +36 days
20-Feb-2009 Maureen Cross Streatley, Berks +27 days
08-Feb-2008 Dave Wilton Westcott, Bucks +15 days
19-Jan-2007 Nick Asher Sinnner's Green, Berks -5 days
29-Jan-2006 Ched George Radnage, Bucks +5 days
16-Jan-2005 Gareth Clare Wootton, Oxon -8 days
10-Feb-2004 Maureen Cross Streatley, Berks +17 days