Herman Bouman:
Arctic skua (pale) / Stercorarius parasiticus / Kleine jager
Herman Bouman:
Long-tailed skua / Stercorarius longicaudus / Kleinste jager
Herman Bouman:
Arctic skua / Stercorarius parasiticus / Kleine jager
Herman Bouman:
Long-tailed skua and Pomarine skua / Stercorarius longicaudus and pomarinus / Kleinste en Middelst jager
Herman Bouman:
Long-tailed skua
Herman Bouman:
Long-tailed skua / Stercorarius longicaudus / Kleinste jager
Herman Bouman:
Artic skua / Stercorarius parasiticus / Kleine jager
Herman Bouman:
Leach's storm petrel / Oceanodroma leucorhoa / Vaal stormvogeltje
Herman Bouman:
Manx Shearwater / Puffinus puffinus / Noordse pijlstormvogel
Herman Bouman:
Manx Shearwater / Puffinus puffinus / Noordse pijlstormvogel
Herman Bouman:
Manx Shearwater / Puffinus puffinus / Noordse pijlstormvogel
Herman Bouman:
Manx Shearwater / Puffinus puffinus / Noordse pijlstormvogel
Herman Bouman:
Long-tailed skua / Stercorarius longicaudus / Kleinste jager
Herman Bouman:
Long-tailed skua / Stercorarius longicaudus / Kleinste jager
Herman Bouman:
Long-tailed skua / Stercorarius longicaudus / Kleinste jager
Herman Bouman:
Leach's storm petrel / Oceanodroma leucorhoa / Vaal stormvogeltje