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[[underline]] stolidus [[/underline]] 21 [[page start]] October 27, 1955, Santa Cruz, Academy Bay [[left margin column of crosshatch marking]] Form of LCN? Bird on ledge of cliff. Looks like potential nest-site. Gives note whenever another Noddy flies nearby. Each note a Rattle or Tuking (will call Tuking in my notes, but really a rattle), quite mechanical in sound, "r-r-r-r-r-r." Each note accompanied by slight by definite upward and forward stretching of the neck. Head remains more or less horizontal. Bill widely opened during note. Relaxation complete between notes [[sketch--head and torso of bird with beak open]] [[caption]] Posture during Tuking note]] Have heard same note given by flying birds, (from usual unritualized postures) [[end page]]