passerine dream (11. 493)

Via Damn Interesting’s Curated Links, not only do we learn that our avian friends also dream, singing silently in their sleep, but researchers are able after a fashion, to decipher these nocturnal rehearsals by carefully monitoring unconscious muscle contractions along a bird subject’s vocal tract, akin to eye-movements during REM sleep, amplifying and correlating the series of calls with observed behaviours. These dream sounds, using a Great Kiskadee (pitogue, bichofeo—a member of the tyrant flycatcher family and named onomatopoeically for its exuberant call, bien-te-veo or “I see you well”) from Central and South America for the study, suggest that the specimen was replaying a daytime territorial defence with an encroaching intruder, insightful surely but given the nature of dreaming, perhaps only part of the story. More from New Atlas on the methodology, anatomy of birdsong and a sound-clip at the link above.