From photonegativity to astroorientation in the wood cricket nemobius sylvestris

Beugnon, G.

Monitore Zoologico Italiano 18(3): 185-198


Accession: 005488626

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Young larvae of the wood cricket N. sylvestris (Bosc) (Orthoptera Gryllidae) display negative phototaxis. This photonegativity appears in nature even when terrestrial landmarks, such as a forest border, are available. It is suggested that this basic escape reaction toward the opposite of the sun azimuth constitutes a 1st step in building the astroorientation behavior exhibited by this species only in favorable ecological conditions.