J.Phygors 1980 Calidris melanotos Cruo 3, C.ARL, Barrow, Alaska 22 June "O in low intensity groove call - LIGC with tail cocked - (see tracking data) and he is running away from Q! Harin She follows him ! Shades of Tunggatity . At other times he does not move away in this position but instead moves forward. His body is noticeably lowered toward ground, so much so that his peckoral sac hangs but a continuance from the surface. Wings slightly bowed. Moves like a tank [sketch of bird] LIGC/TC = HIGD Typically gives the LIGC groove call - rrrr rrrr rrrr . He may continue for 10 sec - 2 minutes and then either stop, often to Alert-Preen, or go into the rolling groove display. The Q I am tracking this evening - Redhead - has not yet begun to lay eggs. She spends a significant amount of time working on nest cups. What strikes me is the fact that this O is with her necessity - quite a contrast with the behavior of 839 found 98 who have begun to lay. aside Low intensity groove call (LIGC) = the noise he makes being homologous I am sure with alpine frog calls. rrrr rrrr rrrr. LIGC display is this when the male is simply standing; often alert on a mound. High intensity groove display = that call in poster drama above Rolling Groove - usually follows LIGC, given within 10 cm or so of Q, following her around; peckoral sac bouncing with a horrendous bubbling, rolling sound coming out. Continuous carophony, rising & lowering in a regular fashion at 1-2 sec intervals. Resembles something like O with tail cocked position, head raising & lowering along with the changes in pitch of the sound, minute 96 of tracking session (= ~0015) Q remaining w/ g. She is chipping away - see data from this p.m. There is no way I would hear this if this Q weren't so tame.