As regular CFZ-watchers will know, for some time Corinna has been doing a column for Animals & Men and a regular segment on On The Track... particularly about out-of-place birds and rare vagrants. There seem to be more and more bird stories from all over the world hitting the news these days so, to make room for them all - and to give them all equal and worthy coverage - she has set up this new blog to cover all things feathery and Fortean.
Showing posts with label harsh winters. Show all posts
Showing posts with label harsh winters. Show all posts

Tuesday, 13 October 2015

Britain faces longest winter in 50 years after earliest ever arrival of Siberian swan


The arrival of winter, traditionally heralded by the migration of Siberian swans, has come early as 300 birds flock to Britain

By Lexi Finnigan

7:05PM BST 12 Oct 2015


Britain is facing its longest winter in 50 years after the earliest-ever arrival of a Siberian swan which traditionally heralds the start of the season.

Each year around 300 Bewick's swans migrate 2,500 miles from Arctic Russia to escape the approaching cold weather which follows closely behind them.

They flock to the Wildfowl and Wetlands Trust reserve at Slimbridge, Glos, where their arrival has been recorded since 1963.

The first bird arrived on Sunday - a full 25 days earlier than last year and the earliest date on record.

It coincided with the first frosts of the autumn in the area and experts say its early return could be a sign of a long, hard winter ahead.

The premature arrival of winter in many European countries has encouraged Bewick's swans to flock westwards earlier than usual.

"Apparently there's a Russian saying that 'the swan brings snow on its bill', because they tend to move just ahead of the cold weather."
Swan expert Julia Newth

Temperatures are currently five to 10 degrees below average in parts of western Russia and eastern Europe and are expected to drop to the minus 30s.

Spurred on by bitter north easterly winds, many of the swans are currently gathering in the Netherlands, with 45 on Lake Gooimeer and 80 on Lake Lauwersmeer.

Thursday, 4 July 2013

Surviving Fasting in the Cold


July 2, 2013 — King penguin chicks survive harsh winters with almost no food by minimising the cost of energy production. A new study, to be presented at the Society for Experimental Biology meeting in Valencia on the 3rd July, shows that the efficiency of the mitochondria, the power house of the cell, is increased in fasted king penguin chicks.

King penguin chicks are socially and morphologically well adapted to harsh environmental conditions, however, they experience a severe energy challenge during the cold sub-Antarctic winter, when food is not readily available. Research headed by Pierre-Axel Monternier and Prof Damien Roussel at the Ecology of Natural and Man-impacted Hydrosystems laboratory in France looked, for the first time, at how the king penguin chicks' mitochondria in skeletal muscle, the main heat producing tissue in birds, function during fasting in the winter.

Pierre-Axel Monternier said: "We found that the efficiency of mitochondrial functioning increased in fasted winter-acclimatized king penguin chicks. This indicates that less substrate/oxygen was consumed to produce the same amount of energy in the form of ATP, showing that mitochondria from fasted chicks adjust its functioning to minimize the cost of energy production."