Friday, May 17, 2024

FOWL NEWZ

Swallow, swift and house martin populations have nearly halved, finds UK bird survey

Phoebe Weston
THE GUARDIAN 
Thu, 16 May 2024 

The decline of insects means there is less food around for birds like swallows. Photograph: Steve Hedges wildlife photography/Alamy


Swallows, swifts and house martins were once a common sight over UK towns and cities, dextrously catching insects on the wing. But these spring and summer visitors are becoming increasingly rare, according to the definitive survey of the country’s birds.

Populations of these insect-eating birds have dropped by 40% or more in the past decade, according to the latest Breeding Bird Survey (BBS) report.

The decline of insects means there is less food around for these birds and their chicks. There are also fewer places for them to nest as old houses are renovated, leaving fewer gaps in roofs and eaves.
Interactive

Farmland and woodland birds are also in decline, with the turtle dove – which was once a common sight on agricultural land – showing a reduction in numbers of 97% since 1995. It is now so rare experts can no longer monitor it effectively. Other farmland birds such as grey partridge, lapwing and curlew have all seen their numbers at least halve during the same period.

“Along with aerial insectivores, several other groups have experienced sustained long-term declines,” researchers wrote in the report, which produced population trends for 119 species. In total, 42 species are in decline.

Related: Birdsong once signalled the onset of spring on my street – but not this year | Tony Juniper

The BBS is one of the UK’s longest-running citizen science projects, reliant on the work of nearly 9,000 enthusiasts. One hundred people have been submitting records for all 30 years that it has been running.

Common terns declined substantially between 2022 and 2023, with avian flu known to have wiped out large numbers. Other insect-eating birds are also sharply declining, with spotted flycatchers and pied flycatchers having declined by 68% and 59% respectively in the past 30 years.

Dr James Heywood, a BBS national organiser, said: “The report highlights declines in wide-ranging groups of species, from birds reliant on insects, farmland and woodland birds, as well as pointing to additional and acute challenges like avian flu.”

However, it is not all bad news. Birds such as goldfinches, great spotted woodpecker and nuthatch are doing relatively well. Red kites have been a major success story, with numbers increasing by 2,200% since the survey started. Little egrets – which are making a comeback in the UK – have increased by 2,300%.

In total, a fifth of the 35 species showing increases are non-native birds, including the ring-necked parakeet and Egyptian goose.

The survey is a partnership project between the British Trust for Ornithology, the Joint Nature Conservation Committee and the Royal Society for the Protection of Birds (RSPB).

Simon Wotton from the RSPB said: “By looking at this valuable long-term data we can see which species most need our help and where our efforts are best spent when addressing the nature and climate emergency. The changes in range and abundance of some of our bird species should give us cause for concern, and impetus for action.”


Little pengui
ns at risk of vanishing from WA island as once-thriving colony reduced to 120 birds

Narelle Towie
THE GUARDIAN
Thu, 16 May 2024

A little penguin in a nesting box on Penguin Island.
Photograph: Dr Joe Fontaine/ Dr Erin Clitheroe


A once-thriving population of little penguins on a tourist island off Perth’s coast has plummeted to no more than 120 birds, with plans to build a container port in nearby foraging grounds further threatening the survival of the colony.

The latest population study on Penguin Island – 600 metres offshore and 50km south of Perth city – has revealed that penguin numbers have crashed by two-thirds in the past five years, sources say.

The little penguin population, called Weedee in Noongar, has declined by 92% since 2007.

Related: ‘Only hope we’ve got’: the audacious plan to genetically engineer Australia’s endangered northern quoll

A scientific report, commissioned by the local Rockingham council and detailing the extent of the problem, was provided to the council in late April before being passed to the state government. Guardian Australia has repeatedly requested the report, but neither office has made the findings public.

Since 2012, researchers have been sounding the alarm about the penguins, which have been ravaged by boat strikes, parasitic infections and marine heatwaves that have robbed them of their preferred prey fish.

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In 2017 the population nosedived by a quarter to 518, according to the University of Western Australia biologist Belinda Cannell, who also wrote the new report.

In 2021 the penguins endured a horror breeding season in which half the chicks died, leaving behind an ageing breeding population.

“Without informed management, we will very likely lose this genetically important population of little penguins,” Cannell said in January.

Scientists working on the island, including Cannell, declined to comment on the latest report until it was released.Interactive

For decades, research and management documents have shown that tourism can affect the breeding success of little penguins, Eudyptula minor.

Erin Clitheroe, a biologist at Murdoch University, said it was death by a thousand cuts for the penguins, with tourism not the only pressure, but one that could be managed.

Related: King penguin swims thousands of kilometres to find itself on South Australian beach

Boats bring visitors to the island every 20 minutes between mid-October and June, unless the temperature climbs above 35C. The access period has been shortened in recent years as the population went into freefall.

Advocates have proposed that the island be closed to tourists throughout the year.

The WA environment minister, Reece Whitby, said the major factor in the population decline was the warming sea temperature. He cited measures the government had put in place to protect the penguins, including the winter closure period, the scrapping of a planned discovery centre on the island and the installation of 125 artificial nest boxes.

“Tourism plays an important role on the island by educating visitors about the penguins and promoting enjoyment of our state’s natural environment,” he said.

But Dawn Jecks, a City of Rockingham councillor and convener of Save the Little Penguins, said Whitby’s department had carried out building work on the island for five years, and needed to do more to protect the penguins from marine traffic.

“We have a management plan for the island that is 22 years out of date, 22% of the birds are dying from boat strike, and gangs of jet skis are speeding and doing rings around Penguin Island in a wildlife conservation zone,” she said.

WA’s Department of Biodiversity, Conservation and Attractions said the research commissioned by the council was “vital”, but it would not comment on the population report before it was published.

It said the department had increased patrols of the waterways around the islands, among other measures.
Plans for nearby container port

As well as human activity and the changing climate, the colony faces a new challenge in plans to relocate Fremantle’s container port to Kwinana, opposite Garden Island and extending into Cockburn Sound, where some of the Penguin Island birds forage.

Garden Island, a naval base off-limits to the public, is home to a second colony of little penguins that feed exclusively in Cockburn Sound.

To make the port big enough for container ships, parts of the sound would have to be dredged, affecting fish stocks.

The federal government has committed $33.5m towards developing the $4bn Westport project, which includes a freight road, rail and logistics operations for the port.

Westport said the port would be the most sustainable in Australia and that it had partnered with the Western Australian Marine Science Institute to provide $13.5m to study Cockburn Sound.

“This work has already resulted in a decision to move the port footprint 1km south to avoid any direct impact to seagrass beds in Cockburn Sound, and a design that will minimise impacts to the marine environment,” a Westport spokesperson said.

Related: Plans for discovery centre on WA island dropped to protect little penguins

In a study published for Westport last December, Cannell found that both colonies of little penguins would be affected by dredging through loss of food sources, noise and reduced ability to see predators.

The 15-year project has been referred for the highest level of environmental assessment through WA’s independent Environmental Protection Authority.

The WA Greens MP and former Fremantle mayor Brad Pettitt said the government should follow the evidence of what the port would mean for wildlife populations.

“Government is proceeding as if Westport is a given, despite their own reports revealing some very major impacts from that project on the health of the sound, including on penguin and fish populations.

“It is industrialisation of Cockburn Sound.”

• This story was corrected on 17 May 2024 to give accurate dates for island visits.

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