Marshall, 1945 33. Palau Caprimulgus indiens Those shied when quiet were foraging fly-catcher fashion. Sit on exposed bare twig, fly out 25 yds or more & return (or move to next tree if in open co.) When flushed from perch give a snore "karump, karump" (Mays). "Hammer-beat call" is harsh whistle of downward inflection, staccato even series, 2 or 3/second. This, in the rare times when the birds were really aroused, or remembering breeding season * develops into the interminable roll which is mellower. [*] Perhaps I'm dealing with 2 forms: resident which is uncommon, & gives roll; winter which forages wider & gives the less ecstatic calls. Eye-shine - red, large. Flight, slow-easy to follow with flashlight. The hammerbeat call has a terrific wallop - really is loud & percussive. Rolling call rarely heard - generally several birds together high in highest tree. Some evenings much more calling than others. Favorable evening at dusk: birds chasing each other among & around dense trees uttering the "karump" snore note. Actually a single-syllable resp note.