Image taken from a post on Living Next Door to Alice.  (Find John Prine lyrics there.)

” Because Krsna’s feet is compared as lotus — “lotus feet,” we say — so where there is lotus, there is hamsa, swan. Swan, you’ll find. That is the difference between the crows and the swan. Crows gather in a place, filthy place, where all rotten things are kept. The crows come there. Where all rotten things are there, all the crows will come. But when there is lotus, the crows will not go there; the hamsa, swan, they’ll go there.”

Srimad-Bhagavatam 7.9.18 — Mayapur, February 25, 1976