Our first survey has been very successful and satisfactory. April brought heavy rainfall to the area and we detected a lot of activity during the 3 intensive field days (25th, 26th and 27th of April).

After a careful selection of sites we place 10 camera traps that allowed us to confirm the presence of European otter (Lutra lutra) in the studied quarry. Furthermore we were able to find out that the otter is breeding in the quarry; a camera place in one of the lakes captured an otterfamily of at least 5 members). Moreover, other 10 species were caught by the cameras; e.g. badger (Meles meles) and genet (Genetta genetta). In addition, we found otter dropping samples in 13 out of 19 transects (600 m) carried out around the lagoon system in the quarry area, on the a drainage ditch and on both sides of Duero river and irrigation channel at 5 y 15 km to the east and west of the quarry. These finding provide really good data to study the connectivity of the quarry with the surrounding landscape. We are very excited with the positive and promising results of this first survey and we are looking forward to advancing the research.

We thank Áridos Sanz staff, Tormes Foundation and the Ecology Department of Complutense University of Madrid for their support.