DESCRIPTION:
Trio by Robert Schumann lamenting the death of a songbird, performed by the dwsChorale (D W Solomons multi-tracking)
I've used images of meadow saffron since those are the flowers mentioned in the poem, although they are not strictly speaking red...

The sources of the images are as follows

Canaries in cage (in Treviso) taken by me

Wikimedia
single meadow saffron Luc Viatour (Lviatour)
group of meadow saffron Chris Dixon (Stemonitis)
Canary - (Magnus Colossus)
Rosebud - (Amada44)