Gouache on paper-Rajasthan 1710  by Jagannath of Mewar

The couplet atop is from Bihari Sat Sai, composed in 1662 - Radha is speaking...

"Such is the darkness brought in by the clouds in its seasons of rains that one can distinguish night from day only by looking at the chakwa birds." (Chakwa birds can meet only by day; at night they must separate)