Precise measurement of the leg length of a Blue Petrel (Halobaena caerulea) after banding, as part of an annual monitoring program over several decades on ile Verte. Gulf of Morbihan, Kerguelen archipelago.

halobaena caerulea natural reserve scientific instrument scientist ornithology man hand paw measure to indian ocean kerguelen islands fr february tag french southern and antarctic lands nature reserve halobaena blue petrel halobaena caerulea nature reserves nature reserve scientific instruments scientific material scientific materials scientific study material scientific studies materials scientific measuring instrument scientific measuring instruments laboratory instrument scientists ornithologist ornithologists ornithological ornithologicals men hands paws measured measuring least concern species tags tagging ring tagging rings environment protection environment management biodiversity management environment scientific research science discipline person individual morphology zoology organism world sea and ocean taaf france european union europe iucn red list of threatened species species tagging animal tagging population management species management procellariidae procellariiformes aves sauropsida tetrapoda tetrapodomorpha rhipidistia sarcopterygii euteleostomi gnathostomata vertebrata chordata deuterostomia coelomata bilateria metazoa opisthokonta eukaryota petrel sea bird bird sauropsid vertebrate chordate wild animal animal