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8 December 2016

The song of silence [Phys]

Like humans learning to speak, juvenile birds learn to sing by mimicking vocalizations of adults of the same species during development. Juvenile birds preferentially learn the song of their own species, even in noisy environments with a variety of different birdsongs. But how they can recognize their species’ song has, until now, remained a mystery. In a collaborative study, neuroscientists and a physicist at the Okinawa Institute of Science and Technology Graduate University (OIST) have uncovered an innate mechanism for species identification based on the silent gaps between birdsong syllables.

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7 December 2016

Biodiversité : tous les indicateurs sont au rouge [Le Monde - Planète]

Réunis à Cancun, au Mexique, 196 pays doivent tenter de stopper l’érosion de la vie sauvage, terrestre et maritime, dans le cadre d’une COP de la diversité biologique.

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7 December 2016

La planète revisitée - A la recherche de la biodiversité en Nouvelle-Calédonie : chasseurs nocturnes (3/5) [Le Monde]

Depuis le début du mois de novembre, une dizaine de scientifiques passe au peigne fin un petit coin de forêt perché au cœur de la « côte oubliée », une chaîne montagneuse de Nouvelle-Calédonie vierge de toute présence humaine. Durant cette expédition inscrite dans le programme « La Planète revisitée », conduit par le Muséum national d’histoire naturelle et l’ONG Pro-Natura International, les chercheurs traquent la « biodiversité négligée » durant la journée, mais également au beau milieu de la nuit.

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7 December 2016

Polar bear numbers to plunge a third as sea ice melts: study [Phys]

Polar bear numbers could drop a third by mid-century, according to the first systematic assessment, released on Wednesday, of how dwindling Arctic sea ice affects the world’s largest bear.

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5 December 2016

Female lemurs with color vision provide advantages for their group [Phys]

Female lemurs with normal color vision, as well as their cohabitating colorblind group members, may have selective advantage over lemur groups whose members are all colorblind, according to anthropologists at The University of Texas at Austin.

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