Because when the air is damp it conveys the odours of flowers more effectively than it does when dry.
1104. Why when swallows fly low may wet weather be expected?
Because the insects which the swallows pursue in their flight are flying low, to escape the moisture of the upper regions of the atmosphere.
1105. Why do ducks and geese go to the water, and dash it over their backs on the approach of rain?
Because by wetting the outer coat of their feathers before the rain falls, by sudden dashes of water over the surface, they prevent the drops of rain from penetrating to their bodies through the open and dry feathers.
1106. Why do horses and cattle stretch out their necks and snuff the air on the approach of rain?
Because they smell the fragrant perfume which is diffused in the air by its increasing moistness.
"I will remember the works of the Lord: Surely I will remember thy wonders of old."—Psalm lxxvii.