Last week I had a little break in a country home, when I received a message from Vincent Mouret, a French birdwatcher who visited the Rio Palenque Biological Reserve in Ecuador. This reserve was created in 1970 as a biological station in the western lowlands in Prov. Los Rios, south of Quevedo.
In my blogpost of 08-06-2010 I reported that Lissachatina fulica had been found in Puerto Iguaz??, Dept. Misiones, Argentina. This finding is now documented in a paper by Guti??rrez et al. (2011). According to this paper the introduction took place approximately three years ago, and the population seems to be well-established. Also the risks to the native snail populations are stipulated, viz. competition for food and refuge. It is suggested that the pathway for introduction was the use of snails as fish bait.
Lissachatina fulica is marching up rapidly and causing new problems.
Gerard van Buurt kindly corrected my statement in my post http://ashbreure.posterous.com/a-new-species-for-curacao on the occurrence of Zachrysia provisoria on St. Maarten and Antigua. It is a lapsus and these records actually refer to Lissachatina fulica.