Knowledge about the puma Puma concolor in the Mediterranean Andes of South America is scarce, with little information available about its distribution and ecology. The species has been hunted in the region for centuries and seems to be relegated to remote areas, where it still comes into conflict with rural communities. Camera-trap surveys have been used to estimate puma density across the species' distribution, and this is a relatively cost-effective approach to generate information about species abundance. We tested the performance of this method in the Andes of central Chile, where the rugged topography, unknown detection probability, and an expected low density make abundance estimation by other methods unreliable or expensive. Using a rotation of  camera-trap stations, for a total of  camera-days, we obtained  records of pumas and were able to identify four individuals in an effective sampling area of  km  (/ mean maximum distance moved) or , km  (mean maximum distance moved). Capturerecapture models estimated a minimum density of . ± SE . to . ± SE . adult pumas per  km  . This is the first estimate of the density of the puma in the Mediterranean Andes, and one of the lowest reported for the Neotropics. Although this low abundance does not necessarily imply a threat to the species, it suggests that the population is potentially vulnerable to threats such as illegal hunting. Our findings demonstrate that camera trapping is an effective technique in difficult field conditions and may be the most appropriate method to assess puma densities in this region.

Myxomas are an uncommon neoplasm in vertebrates, and are found at a low frequency in birds, both wild and domestic. We report myxomas in two Kelp Gulls ( Larus dominicanus) in Chile, identifying tumors in specimens that were received for necropsy.