The Coypu is prevalent in Le Boivre

Coypu Here is a photo taken today in our river (Le Boivre) showing a Coypu. I have extracted the following notes from the Sea-River Newsletter at http://sea-river.com/95_3_gb.php
The coypu was introduced into Europe in the 19th century for the quality of its fur and it has spread to many regions since the closure of fur farms. It is abundant in marshes. Over the last few years it has extended its territories and is even found in towns. How can this invasion be stopped?
The coypu (Myocastor coypus) is distinguishable by its size: it can measure up to one metre in length (tail included) and weigh from 9 to 10 kgs (the size of a cocker spaniel!), its long incisors are orange in colour and it has a round tail covered with small scales. This is once again an introduction which has gone wrong.
The coypu is native to South America (Chili, Brazil, Bolivia and Uruguay in particular). It was discovered in the 17th century and introduced into Europe in the middle of the 19th century (at this time many new species were being imported). Breeders and furriers were interested in its dense fur which consists of long coarse hairs and an thick underfur. Fur farms started up all over Europe as it was not difficult to farm and its fur fetched a good price. White and different coloured fur obtained from selective breeding was much sought after. The meat could be used in paté as this rodent like the rabbit feeds on vegetation. Unfortunately the 1929 crash caused the ruin of breeders who opened the cages and released the animals into the wild. Since then fresh attempts to farm have been made here and there but have come to nothing, mainly owing to changes in fashion rather than the action of movements against the use of animal fur. Consequently coypus settled in the wild with varying degrees of success: they invaded marshland where they are currently abundant, elsewhere they have more or less disappeared. For several years they have been gaining ground and are establishing colonies on numerous river banks. They are found in Paris despite the fact that the banks of the Seine are of stone and concrete.
Old documents indicate that they are not harmful as they feed mainly on rushes and other aquatic vegetation. What had been forgotten was that their burrows damage and weaken river banks, dykes and ponds. They also consume large quantities of food like all rodents to wear down their teeth which grow continuously, subsequently the vegetation is constantly cut down.
Sometimes they are very abundant indeed. In France, it is estimated that there are over a million coypus in the Camargue region, a few hundred thousand in the Dombe (Ain), in the marshland of the Poitevin, in Brière and elswhere. From these and other places it continues to spread and colonize other territories. It is becoming a nuisance in many places.
How can its spread be halted? Poisons are banned so the only other alternatives are hunting and trapping. Coypus are essentially noctural, hunting will never be an effective solution even using adapted methods. Trapping is efficient as the animal is not very cunning but there are strict regulations in France and other countries. This method also has its limits : it is easy when the animals are numerous but less effective as soon as the populations decline. For trapping to be effective it must be carried out over a vast area otherwise the populations will constantly reappear. The Authorities in France are sometimes involved in operations to limit populations by offering a payment for each animal caught of 1 to 3 euros accordingly but the cost of capturing an animal is 7 euros (traps, time, training). Then there is the question of what to do with the trapped animals? The pelt can be used, it is of excellent quality in winter but there is no active market. The meat can be used for paté and sold locally and the teeth can be used for pendants. The trade could be reactivated and become profitable for many trappers, tanners and furriers, but political action would have to be taken to to get things moving. During this time the coypu would continue to spread…