Figure 1.
European catfish displaying beaching behavior to capture land birds.
Several individuals were observed swimming nearby the gravel beach in shallow waters where pigeons regroup for drinking and cleaning (large picture). One individual is seen approaching land birds and beaching to successfully capture one (small pictures).
Figure 2.
Stable isotope values of European catfish and the putative prey.
δ13C and δ15N values (‰) of each individual (n = 14) and the putative aquatic (fish, n = 9 and crayfish, n = 3) and terrestrial (pigeon, n = 6) prey are displayed. The large symbols for each prey represent the mean value (± SD).
Figure 3.
Predicted contribution of putative prey to the diet of each European catfish.
Putative prey are (a) fish (in red), (b) crayfish (in blue) and (c) pigeons (in green). Reported values are the lower and upper 50, 75 and 95% Bayesian credibility intervals predicted by the mixing models.