A mild, wet 2024 bookended by storms hit butterflies, bees and birds, as unpredictable weather and “blurring seasons” puts pressure on wildlife, the National Trust said.
The wet start to the year “kicked in touch” any remaining symptoms of the drought caused by the record heat and the dry conditions in 2022 which lingered into 2023 in some parts of the country, the conservation charity said.
That spelled good news for trees which were able to recover from drought stress and helped establish newly planted saplings that form a key part of the National Trust’s efforts to increase woodland cover on its estate, while the damp conditions also boosted fungi in the autumn.
Storms battered the UK at the beginning and end of the year, bringing down trees and causing widespread flooding and disruption.
National Trust properties did not escape, with Avebury Manor in Wiltshire flooding for the first time in 300 years in January and Charlecote Manor in Warwickshire flooding eight times in 2024, while rain and lough levels submerged jetties for six weeks in the summer at Crom, Northern Ireland.
The year saw a warm, unsettled, wet and dull spring, with the warmest May on record, followed by a cooler than average summer, and the wettest September on record for 10 English counties – though there were drier conditions elsewhere.
The cool wet start to the year saw bluebells flower later, while mild temperatures in September and October led to a late arrival of autumn and continued grass growth.
The National Trust also said some gardens were now seeing early flowering, with camelias in Cornwall, snowdrops two weeks early in Dorset, and even blossom peaking through on apple trees.
Mr McCarthy said nature, already struggling in the face of historic land use change such as the loss of 97% of flower-rich grasslands, intensification of agriculture and pollution, was now facing a climate hit.
“The unpredictability of the weather and blurring of the seasons is adding additional stresses to our struggling wildlife,” he warned.
He said that in the last few weeks, conditions seesawed from freezing to “balmy” and raised concerns about what that would be doing to species such as hedgehogs and bats which are trying to hibernate.
“The biological impacts this has on these species is really quite significant,” he said, adding: “We have other impacts like significant rainfall which causes localised flooding, which is impacting other species.”
Keith Jones, climate change adviser at the National Trust added: “Our unpredictable weather is resulting in confusion for our wildlife and the slow loss of what once were ‘predictable’ seasons.
“Our landscapes need to be in a fit or in a favourable condition to better withstand these changes.”
The National Trust pointed to “nature-based solutions” such as peatland restoration, which rewets peat to boost wildlife habitat and hold back water on the uplands to prevent flooding and future drought.
Meanwhile, river restoration projects such as “rewiggling” Goldrill Beck in the Lake District, and what Mr McCarthy called a “control, alt, delete” reset to allow the river at Holnicote on Exmoor to find a new natural path, have boosted wildlife and created wetlands that reduce flood risk downstream.
