Friday, October 30, 2015

New technologies saddled old beliefs on … –

In our region, the fall is obviously synonymous with “palombite” this fever triggered by the passage of pigeons. The opportunity to take stock of the migratory … and some others, such woodcock, thrush and quail. As new technologies allow researchers and hunters to undermine today few misconceptions.

In the past, things were simple. like the train that proudly bore his name from Tarbes to Paris, in the public mind the blue pigeon traveling on rails. Air, certainly. But the rails. On September 21, at 6 am 47, the Scandinavian air traffic controllers gave him the top. She then took off from northern Europe with his small suitcase to not miss his appointment with the Pyrenean passes and elders explained to the foolish notion of “long and short migrants”. In essence … “More pigeons come from far north, the more they go down south, others are shorter migration: those of Western Europe overwinter in the Southwest.”

Until the day when we realized, migration variant that ultimately we did not know much about the legendary Bluebird. And Argos are then came illuminate another angle habits, or rather, the lack of habits Columba palombus, wood pigeon.

Set in his office hosted by the Federation of Hunters Pyrénées-Atlantiques, Pau, Valerie Cohou knows something. Special assistant to ISFM, investigative wildlife Group, it ensures since 2001 the population-followed the pigeon in Aquitaine and Midi-Pyrénées, in partnership with hunting federations.

tags and counts

Four metering stations installed at the collar of Urrugne, Sare, Banca Arnéguy and the Basque Country, using the video also counts but also contacts with the Poitou-Charente region, Central and Limousin: “We are here to see the trend of evolution of wintering and migrating populations,” she says. And what comes out, “rather it is the stability of the wood pigeon, but especially a population that has adapted, notably extension of maize because this bird is very opportunistic.”

It has indeed highlighted the equipment 60 pigeons with an Argos beacon since 2001 and their monitoring through satellite CLS Collection Location Satellite, CNES subsidiary based in Ramonville, near Toulouse and world leader in this sector. “We thus realized that there was no” long “or” short “migrants, all patterns were possible,” says Valerie Cohou.

In a workbook, each bird a plug. “Take the case of Grandola, she was equipped to Portugal, where it overwinters, then comes to nest in Toulouse: it undermines the scheme” long migrants, “not a” long migratory. ” In the case of Aniza now? She was also equipped in southern Portugal … and she left nest in northern Switzerland where she visibly pleased since stayed there a year and a half before returning to winter in the Landes. But it is then distributed 18 months in Switzerland, true to its breeding site. Finally, if we take pigeon “MCCO” (Massif Central, Central West), fitted in the Moors, she should have stayed in France or Belgium but is part to the Arctic Circle in Norway and remained in Aisne, in Saint-Quentin, for winter before returning to breed in Norway where, for now, she is still … “

The bird later hand

A follow-up that has advanced the knowledge of the species at a time when climate change induces awareness of possible changes in migratory behavior, “because with Argos was able to refine the starts as the use of stops and habitat of pigeons. ” The study has established that the bird, he had no systematic migration behavior but also that he was leaving later: “In fact, it is not at February 10, the date had been set the closed season, but in the first decade of March, which helped to offset the closure to 20 February on the entire country, “says Valerie.

Beyond,” with the National Veterinary School of Toulouse, we conducted a study on its diet that has raised the problem of mulching, shredding and burying the corn stubble. This threatened the food source the doves wintering in the south-west. Today, we know that we must leave these maximum stubble field to encourage all wildlife and not the pigeon “.

Twelve birds equipped Midi-Pyrenees

As part of the Midi-Pyrénées component of this program GIFS France monitoring hawk by Argos, twelve birds all have been equipped with six in the Gers (Maite, Tauziole, Lagrauley , Splat, Folgarienne and La Beroy), six in the Tarn and Garonnefinancés by the Midi-Pyrénées region.

(Garona, Violet, Occitania, Castel, Lomagne and Gandalou)

Gers, we know that the Beroy left in Germany, while Flock took the direction of Hungary and Lagrauley Tauziole, that of Poland. Tarn et Garonne, the pigeons have been more casanières. Garona remained in the department, as Lomagne Occitania being passed to the neighbor Landes and Violet in the Cantal. Castel, it is part of the Czech Republic and Gandalou in Russia.

As part of this program, the region has financed the purchase but also the monitoring of Argos, a budget of € 9,500 for the last year of this partnership, in 2014.


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