hippo_b: two swans #1
hippo_b: two swans #2
hippo_b: two swans #3
hippo_b: two swans #4
hippo_b: two swans #5
hippo_b: two swans #6
hippo_b: a flock #1
hippo_b: a flock #2
hippo_b: a flock #3
hippo_b: a flock #4
hippo_b: a flock #5
hippo_b: a flock #6
hippo_b: a flock #7
hippo_b: a flock #8
hippo_b: taking a nap #1
hippo_b: taking a nap #2
hippo_b: landing #1
hippo_b: landing #2
hippo_b: landing #3
hippo_b: landing #4
hippo_b: the swan was alone.
hippo_b: flying swans #1
hippo_b: landing #5
hippo_b: landing #6
hippo_b: landing #7
hippo_b: started swimming.
hippo_b: a white heron and a swan
hippo_b: flying swans #2
hippo_b: flying swans #3