The next afternoon a dense flock of sea-birds appeared from the south, and the ocean began to heave ominously.

I watch them continually as they attack the dense flocks of small birds that throng the bushes at the water's edge.

The grey swans were moving in a dense waddling flock along the beach, craning their necks in alarm towards the ice field.

The African Silverbill is tame and sociable, often found perching in trees in dense flocks, touching one another.

And again: Maria "was filled with the most extraordinary confusion, excitement, fear; a dense flock of mixed-birds inside her."

Today reportedly these sheep do poorly when in large dense flocks.

The plains fizzed with aquatic wildlife and dense flocks of birds.

Too often, my lure or line tangled wheeling gulls from among the dense flocks that hover over bluefish schools, looking for leftovers.

Already the black-headed gulls had arrived in their dense flocks to set up their nesting colonies on the heights of the bluff.

They will however form dense flocks on high tide roosts.