Wildlife's winners and losers of 2021 - and how extreme weather set the tone

National Trust/Kelvin Boyes/Press Eye Wildfire raging in the Mourne Mountains, Northern Ireland, April 2021National Trust/Kelvin Boyes/Press Eye
Wildfire raging in the Mourne Mountains, Northern Ireland, April 2021

Wildlife across the UK is increasingly suffering the impacts of extreme weather events and natural disasters, says the National Trust as it publishes its annual reckoning of UK wildlife "winners and losers".

The conservation charity also warns some of the landscapes it cares for are being altered forever as climate change makes some forms of extreme weather the new normal.

It points to the very dry spring that saw wildfires devastate parts of National Trust estates in the Mourne Mountains in Northern Ireland and Marsden Moor in Yorkshire.

The fires destroyed habitats for a range of threatened species including golden plover and Irish hare.

National Trust/Victoria Holland Fire on Marsden Moor, April 2021National Trust/Victoria Holland
Fire on Marsden Moor, near Huddersfield, April 2021
1px transparent line
National Trust/Marc Vinas Golden plover spotted in the Mourne MountainsNational Trust/Marc Vinas
The golden plover was spotted in the Mourne Mountains
1px transparent line
National Trust/Marc Vinas Irish hare spotted in the Mourne MountainsNational Trust/Marc Vinas
The Irish hare was also seen in the Mourne Mountains

Meanwhile our warmer, wetter winters have accelerated the spread of diseases such as ash dieback, causing significant loss of trees, the charity says.

This year's settled and warm autumn led to a spectacular show of colour but that was brought to an abrupt end when Storm Arwen ripped through the north of the country in November causing widespread destruction.

It uprooted thousands of trees on National Trust land in the Lake District and destroyed hundreds of irreplaceable trees and plants at its Bodnant Garden in Wales.

National Trust/Paul Harris Aerial view of devastation caused by Storm Arwen at Bodnant Garden in north WalesNational Trust/Paul Harris
Aerial view of devastation caused by Storm Arwen at Bodnant Garden in north Wales

At Wallington in Northumberland, where gusts reached 98mph, more than half of the 250-year-old oak and beech trees were uprooted.

"These extreme events are putting even more pressure on Britain's wildlife", warns Ben McCarthy, head of nature conservation at the trust.

He says more than half of UK species are already in decline and 15% of wildlife species are under threat of extinction.

"Isolated or small populations are the most at risk from climate impacts," he says, but not all species have suffered. Some animals and plants have actually flourished this year.

Here's a selection of the National Trust's run down of winners and losers on the 250,000 hectares of countryside, 780 miles of coastline and 500 historic properties, gardens and nature reserves it looks after:

Winners

The grey seal colonies cared for by the National Trust are expecting another increase in pup numbers thanks to a lack of predators and plentiful food.

Orford Ness on the Suffolk coast recorded record numbers of seals. Normally one or two are seen at a time, but this year 200 were out on the beach together and stayed for several days.

National Trust/David Crawshaw Seals at Orford Ness, SuffolkNational Trust/David Crawshaw
Seals at Orford Ness, Suffolk
1px transparent line
National Trust/Hanne Siebers Grey seal pup at Blakeney Point in NorfolkNational Trust/Hanne Siebers

The dry May and exceptionally warm June helped unroll carpets of pyramidal orchids across Rodborough Common in Gloucestershire.

Autumn lady's-tresses, the latest flowering UK orchid species, also had a very good year thanks to the cold wet May. The plant's distinctive spires of white flowers appeared in the thousands at some grasslands and sand dunes in southern England and Wales.

National Trust/John Newbould Multi-stemmed autumn lady's-tressesNational Trust/John Newbould
Multi-stemmed autumn lady's-tresses

There was good news for the beavers released on the Holnicote Estate on Exmoor in January last year. Their first kit was born in June.

National Trust/Nick Upton Beaver on the National Trust's Holnicote Estate in SomersetNational Trust/Nick Upton
Beaver on the National Trust's Holnicote Estate in Somerset
1px transparent line
National Trust Beaver kit caught on a night cam at the Holnicote Estate in SomersetNational Trust
Beaver kit caught on a night cam at the Holnicote Estate in Somerset

It has also been a bumper year for grassland fungi with waxcaps doing especially well - evidence that some grasslands are thriving. In Shropshire, National Trust rangers were delighted to find 17 species of these fungi in one meadow.

Meanwhile in Herefordshire, the team discovered an example striking non-native species - called Devil's Fingers or Octopus Stinkhorn - which was introduced to Europe accidentally from Australia or New Zealand around 1920.

National Trust/Steve Hindle Shadowed waxcapNational Trust/Steve Hindle
Shadowed waxcap
1px transparent line
National Trust/Pete Carty Pink waxcap at Jinlye Meadows in ShropshireNational Trust/Pete Carty
Pink waxcap at Jinlye Meadows in Shropshire
1px transparent line
National Trust/Andrew Perry Devil's fingers at Bircher Common in ShropshireNational Trust/Andrew Perry
Devil's fingers at Bircher Common in Shropshire

Losers

Butterflies have had a particularly bad year with the lowest numbers of the insects recorded in the Butterfly Conservation's Big Butterfly Count.

National Trust teams reported butterflies emerging later due to the very cool spring, although the range of species remained stable.

National Trust/Rob Coleman Purple Emperor (male) at Sheringham Park in NorfolkNational Trust/Rob Coleman
Purple Emperor (male) at Sheringham Park in Norfolk
1px transparent line
National Trust/Matthew Oates Large blue butterflyNational Trust/Matthew Oates
Large blue butterfly

Oak trees in the south of England hardly produced any acorns this year, says the trust, in contrast to oaks further north which had a bumper crop.

Oak flowers need dry warm weather to successfully produce acorns - conditions found in the north of England but not down south.

National Trust/James Dobson The Holm oak at Westbury Court Garden in GloucestershireNational Trust/James Dobson
The Holm oak at Westbury Court Garden in Gloucestershire

The record number of late frosts through April - and into late May - in some parts of the country hammered apple blossom and led to a poor apple harvest, particularly in northern parts of England and Northern Ireland.

It was a topsy-turvy year for terns too.

At Blakeney Point in Norfolk, little terns - one species of these small seabirds - abandoned their nests, scared off by the presence of a short-eared owl and common gulls. But the neighbouring colonies of sandwich and common terns did well, the Trust says.

National Trust/Ian Ward Little ternsNational Trust/Ian Ward
Little terns
1px transparent line
National Trust/Ian Ward Colony of sandwich ternsNational Trust/Ian Ward
Colony of sandwich terns

Follow Justin Rowlatt on Twitter @BBCJustinR