Butterfly population in the UK

relative to start year (1976 or 1990), 1976–2019

Info Edit
Country19761977197819791980198119821983198419851986198719881989199019911992199319941995199619971998199920002001200220032004200520062007200820092010201120122013201420152016201720182019
Farmland100.00131.50135.2084.7297.72114.50129.40145.80111.60101.10108.8099.0899.31121.30118.80105.40105.6077.4473.28104.40107.6097.9462.37116.40109.90102.0076.0397.05118.00117.70
Habitat specialist100.0026.0642.2638.9038.4520.2739.5334.5948.5240.5536.3041.8731.6237.1542.7534.1948.0837.2340.4544.7742.0743.0529.5832.0633.5732.7329.5836.6439.1737.9344.5629.1025.7033.2643.6543.1522.8033.9637.1532.3526.3028.9040.4541.49
Non-specialists100.0047.0962.6671.2862.8055.2095.0687.70111.1072.4469.8261.8059.7089.3388.3098.17110.4063.0969.9887.0994.18100.6073.7966.6871.6164.8668.0781.2883.3671.9472.7752.9652.2372.2776.2068.5442.6578.7072.7768.7052.1166.5285.7080.35
Woodland100.0091.83110.4156.6261.3887.7088.1090.3658.8851.4053.3351.1757.5470.7971.1260.5358.6141.7838.8257.1564.2756.7532.0658.4852.8450.7036.4849.0969.3459.29

Data is collected for 26 habitat specialist butterflies (low mobility species restricted to semi-natural habitats) and 25 more widespread butterflies (which use both semi-natural and general countryside habitats) using data collected at 5,737 sample locations.

The year-to-year fluctuations in butterfly numbers are often linked to natural environmental variation, especially weather conditions.

Source: UK Office for National Statistics; Department for Environment, Food & Rural Affairs