Reread the last sentence in paragraph 1 of “The Wild Duck's Nest.” The word drifting is a clue that languidly means ?

1 The sun was setting, spilling gold light on the low western hills of Rathlin Island. A small boy walked energetically along a hoof-printed path that twisted between the folds of these hills and opened out into a crater-like valley on the cliff-top. Now he stopped as if remembering something, then suddenly he left the path and began running up one of the hills. When he reached the top he was out of breath and stood watching streaks of light shine from golden-edged clouds, the scene reminding him of a picture he had seen of the Transfiguration. A short distance below him was the cow standing at the edge of a plant-filled lake. Colm ran down to meet her waving his stick in the air, and the wind rumbling in his ears made him give an excited shout which splashed upon the hills in a shower of echoed sound. A flock of gulls lying on the short grass near the lake rose up languidly, drifting like blown snowflakes over the rim of the cliff.