Concern grows for stranded whale
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Rescuers are growing increasingly concerned for the safety of a seven-tonne whale, stranded in the River Thames in central London.
Riverside crowds gathered throughout the day to watch the 16-18ft (5m) northern bottle-nosed whale swim as far upstream as Albert Bridge by Chelsea.
Experts fear it may become beached when the tide changes, or could be put down overnight to prevent further suffering.
Specialist equipment was being used to try to redirect the animal downstream.
The whale, usually found in deep sea waters, has come within yards of the banks and has crashed into an empty boat causing slight bleeding.
Since darkness fell, the whale's location has become unclear with some reports suggesting it may have made some progress downstream.
Vets are remaining on standby and experts have said it does not appear to be ill, but are concerned it will get weaker and may become beached.
Tony Woodley, of the British Divers Marine Life Rescue, which is handling the rescue, said the animal's welfare was the main priority.
He said if attempts to re-direct the whale downstream failed, it might be necessary to put it down to prevent it from suffering further.
'Breathing normally'
The RNLI say it is the first whale rescue on the Thames. A spokesman said three whales were spotted east of the Thames Barrier on Thursday but only one managed to get upstream.
But at 0830 GMT on Friday, a man on a train called in to say he might have been hallucinating, but he had just seen a whale in the Thames.
Alison Shaw of the Marine and Freshwater Conservation Programme at London Zoo, said the northern bottle-nosed whale was usually found in groups of three to 10.
She told the BBC News website: "This is extremely rare in British waters as they are normally found in deep waters in the North Atlantic.
"It is about 16-18ft long, so is relatively mature. It is a very long way from home and we don't know why it has ended up here."
The whales usually weigh about seven tonnes, which will complicate any rescue attempt, experts said.
London Aquarium Curator Paul Hale told the BBC: "Getting that to do anything it doesn't want to do is going to be extremely difficult.
"This is a very active swimming animal and it's not going to go anywhere it doesn't want to go so we have to persuade it to swim back out."
Liz Sandeman, a medic of the Marine Connection, a whale and dolphin protection charity, accompanied the RNLI to examine the animal.
She feared it might be in danger from other boats, or be frightened by the noise.
"The last thing we want to do is stress the animal out," she said.
Over the years dolphins and seals have been spotted in the Thames.
Sperm whales have been seen in the Thames Estuary and porpoises have feasted on fish near Vauxhall Bridge, in central London.
Hyperoodon ampullatus
Adult length: 7-10m (23-33ft)
Weight: 5.8-7.5 tonnes
Diet: Squid, fish
Habitat: Deep offshore waters
Range: Arctic and North Atlantic
Status: Lower risk, conservation dependent, protected since 1977
Distinctive feature: Bulbous forehead
news.bbc.co.uk
Enlarge Image
Rescuers are growing increasingly concerned for the safety of a seven-tonne whale, stranded in the River Thames in central London.
Riverside crowds gathered throughout the day to watch the 16-18ft (5m) northern bottle-nosed whale swim as far upstream as Albert Bridge by Chelsea.
Experts fear it may become beached when the tide changes, or could be put down overnight to prevent further suffering.
Specialist equipment was being used to try to redirect the animal downstream.
The whale, usually found in deep sea waters, has come within yards of the banks and has crashed into an empty boat causing slight bleeding.
Since darkness fell, the whale's location has become unclear with some reports suggesting it may have made some progress downstream.
Vets are remaining on standby and experts have said it does not appear to be ill, but are concerned it will get weaker and may become beached.
Tony Woodley, of the British Divers Marine Life Rescue, which is handling the rescue, said the animal's welfare was the main priority.
He said if attempts to re-direct the whale downstream failed, it might be necessary to put it down to prevent it from suffering further.
'Breathing normally'
The RNLI say it is the first whale rescue on the Thames. A spokesman said three whales were spotted east of the Thames Barrier on Thursday but only one managed to get upstream.
But at 0830 GMT on Friday, a man on a train called in to say he might have been hallucinating, but he had just seen a whale in the Thames.
Alison Shaw of the Marine and Freshwater Conservation Programme at London Zoo, said the northern bottle-nosed whale was usually found in groups of three to 10.
She told the BBC News website: "This is extremely rare in British waters as they are normally found in deep waters in the North Atlantic.
"It is about 16-18ft long, so is relatively mature. It is a very long way from home and we don't know why it has ended up here."
The whales usually weigh about seven tonnes, which will complicate any rescue attempt, experts said.
London Aquarium Curator Paul Hale told the BBC: "Getting that to do anything it doesn't want to do is going to be extremely difficult.
"This is a very active swimming animal and it's not going to go anywhere it doesn't want to go so we have to persuade it to swim back out."
Liz Sandeman, a medic of the Marine Connection, a whale and dolphin protection charity, accompanied the RNLI to examine the animal.
She feared it might be in danger from other boats, or be frightened by the noise.
"The last thing we want to do is stress the animal out," she said.
Over the years dolphins and seals have been spotted in the Thames.
Sperm whales have been seen in the Thames Estuary and porpoises have feasted on fish near Vauxhall Bridge, in central London.
Hyperoodon ampullatus
Adult length: 7-10m (23-33ft)
Weight: 5.8-7.5 tonnes
Diet: Squid, fish
Habitat: Deep offshore waters
Range: Arctic and North Atlantic
Status: Lower risk, conservation dependent, protected since 1977
Distinctive feature: Bulbous forehead
news.bbc.co.uk