"Black-headed gull Predators of." . . "Mouette atricille Mœurs et comportement." . . "Abwehr." . . "Mouette rieuse Prédateurs." . . . . "Laridés. Mouette. Comportement." . . "Raubtiere." . . "Black-headed gull Behavior." . . "Mouette rieuse Mœurs et comportement." . . . . "Predators and anti-predator behaviour of the black-headed gull : (Laurus ridibundus l.)" . . . "Predators and anti-predator behaviour of the black-headed gull (Larus ridibundus L.)" . . "Predators and anti-predator behaviour of the black-headed gull (Larus ridibundus L.)"@en . . . . . . . . . . . "Predators and Anti-predator Behaviour of the Black-headed Gull-Larus ridibundus L. Proefschrift, etc. [With plates, and with summaries in German and Dutch.]"@en . . . . . . "Predators and anti-predator behavior of the black-headed gull (Larus ridibundus L.)" . "Predators and Anti-Predator Behaviour of the Black-Headed Gull, Larusridibundus L. [With plates.]"@en . . . . "Predators and anti-predator behaviour of the black-headed gull : (larus ridibundus L.)" . . "Predators and anti-predator behaviour of the black-headed gull : Larus ridibundus l" . . . . . . . . "Lachmöwe." . .