Swallows usually migrate in September but the mild start to October has left them stuck in the Lot in southwest France
Residents in the Lot, in the Midi-Pyrénées, Occitanie, have reported that many swallows have been suffering in the cold and wet weather conditions, and have been dying from exhaustion after becoming drenched and freezing.
Stéphanie Plaga Lemanski, director at LPO Lot, told local newspaper La Dépêche: "One school in the department counted almost 50 dead swallows in its playground, and the commune of Corn found around 20 dead. It's a massacre; a desolate spectacle of corpses."
She explained that the deaths have likely been caused by the unpredictable weather conditions, with a "brutal cold" hitting the region, as well as sudden high levels of rainfall.
Ms Plaga Lemanski said: "As it was rather mild for the first three weeks of September, the swallows were not encouraged to migrate. Then, one day from the next, it started raining, temperatures fell by 15C, insects were rare so [the birds] struggled to find enough to eat, they get cold and lose energy which stops them flying."
The birds are then susceptible to hypothermia and starvation.
European swallows - often also known as "barn swallows" - are small birds with blue backs, red throats, pale or white underparts, and long tails. They feed on flying insects.
They usually migrate to Africa in September, but sometimes leave it until October in warmer years. They arrive back in Europe in around April, and breed in June. A healthy swallow can live for up to 16 years.
Another bird specialist noticed that the swallows were gathering unusually in the Lac de Bannac, between the Lot and Aveyron, and were being "blocked from their [normal] migration by continuous rain".
Now, residents in the area are being encouraged to help the swallows by capturing them - temporarily - and bringing them inside to warm up.
Ms Plaga Lemanski said: "When you see one...capture it, but watch out - they are fragile birds, and you must handle them very carefully, by using both hands and holding the wings, as if you were picking up a little kitten."
The LPO then advises:
- Put the bird or birds in a shoebox that has had some holes punched in it
- Place a small hot water bottle or a small bucket of warm water at the bottom or back of the box, wrapped in cloth, to heat the box
- You can place a water bowl inside too, for them to drink from
- Put a lid on the box - not an airtight one - so that the birds do not fly away
- You can put more than one bird in one shoebox
- Wait until they appear warm and happy before letting them back outside
- If any of the birds have a metal ring on one of their legs, take down the details on the ring, and report it to the LPO
Ms Plaga Lemanski added: "Do not hesitate to contact the LPO for advice or if the birds look as though they need help from a care centre."
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