Butterfly First Sightings : Clouded Yellow

This page shows the earliest sightings of the Clouded Yellow 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 11th June. The "+- days" column shows the difference from the mean.
Date Recorder Location +- days
19-Jun-2025 Alasdair Wilcock Upton, Bucks +8 days
18-Jul-2024 Sue Taylor College Lake, Bucks +37 days
17-Jul-2023 Karen Saxl Upton, Oxon +36 days
19-May-2022 Rikki Harrington Ivinghoe Hills, Bucks -23 days
19-Jul-2021 Rikki Harrington Ivinghoe Beacon, Bucks +38 days
15-Apr-2020 Neil Popham Milton Keynes, Bucks -57 days
25-May-2019 Chris Lamsdell Wraysbury GP, Berks -17 days
07-Jul-2018 John Lindley Chazey Heath, Oxon +26 days
31-May-2017 John Whitworth Dry Sandford Pit, Oxon -11 days
15-Jun-2016 Martin Kincaid Milton Keynes, Bucks +4 days
12-Apr-2015 John Lindley South Stoke, Oxon -60 days
08-Jun-2014 Pete Thompson Wyfold, Oxon -3 days
19-Jun-2013 Steve Croxford Blenheim Palace, Oxon +8 days
08-Sep-2012 Dave Ferguson Yoesden Bank, Bucks +89 days
07-Apr-2011 Francis Gomme Lodge Hill, Bucks -65 days
30-Aug-2010 Peter Kyle Letcombe Bassett, Oxon +80 days
26-May-2009 Alan Gudge et. al. Frieth, Bucks -16 days
11-Jun-2008 Cliff Robinson Gerrard's Cross, Bucks 0 days
02-Jul-2007 Helen Hyre Bierton, Bucks +21 days
09-May-2006 Robin Dryden Wraysbury GP, Berks -33 days
17-Apr-2005 Barry Collett Carmel College, Oxon -55 days
12-Jun-2004 UTB field meeting Bucks +1 day