MSs, PGs through heat shimmers of numerous terns feeding on plankton at floe edge, shots of them flying and diving (2:34). MCS of three terns preening on ice (1:47). MSs, MCSs of terns flying and diving for plankton at floe edge (11:36). MSs, MCSs through heat shimmers of flock of terns flying and diving at floe edge with sunlight reflecting on surface of water (3:10). MSs of terns feeding (0:59). MCS of and CUs of terns resting on ice preening (3:30). MSs, MCSs through heat shimmers of flock of terns flying and diving at floe edge (1:42).