William Carlos Williams - Dawn

Ecstatic bird songs pound
the hollow vastness of the sky
with metallic clinkings--
beating color up into it
at a far edge,--beating it, beating it
with rising, triumphant ardor,--
stirring it into warmth,
quickening in it a spreading change,--
bursting wildly against it as
dividing the horizon, a heavy sun
lifts himself--is lifted--
bit by bit above the edge
of things,--runs free at last
out into the open--!lumbering
glorified in full release upward--
songs cease.

William Carlos Williams

http://www.poemhunter.com/poem/dawn/