Extinction risk is often associated with intrinsic species traits such as larger size, higher trophic level, narrower habitat niche or smaller distribution area. Despite this, fast extinctions can also occur in species that apparently do not exhibit any of these traits. The Andalusian Buttonquail (Turnix sylvaticus sylvaticus) is a critically endangered taxon, which barely survives in a single population in western Morocco.

Mining is responsible of releasing trace elements to the environment with potential negative effects on wildlife. Traditionally, wildlife exposure assessment has been developed by analyzing mainly environmental compartments or internal tissues. Nowadays, the use of non-destructive matrices such as hair or feathers has increased. Nevertheless, its use in free-living terrestrial mammals or in birds other than raptors or passerines is less frequent. The main objective of this study was to...

Research focused on evaluating how human food subsidies influence the foraging ecology of scavenger species is scarce but essential for elucidating their role in shaping behavioral patterns, population dynamics, and potential impacts on ecosystems. This study evaluates the potential role of humans in shaping the year?round distribution and habitat use of individuals from a typical scavenger species, the yellow?legged gull (Larus michahellis), breeding at southwestern Spain.

Since its emergence in the mid-20th century, invasion biology has matured into a productive research field addressing questions of fundamental and applied importance. Not only has the number of empirical studies increased through time, but also has the number of competing, overlapping and, in some cases, contradictory hypotheses about biological invasions. To make these contradictions and redundancies explicit, and to gain insight into the field’s current theoretical structure, a Delphi...

The corixid Trichocorixa verticalis originates from North America and is the only
aquatic hemipteran alien to Europe. It is spreading in south-west Iberia where it is
the dominant corixid in permanent, saline wetlands, where it may have excluded
halotolerant native corixid species. In the Doñana wetland complex in south-west
Spain, it is abundant in temporary brackish ponds but almost absent from
temporary fresh ponds where the native Sigara lateralis is the dominant...