Need critical analysis about this poem (Writer tone,language,imagery,similes,intentions,persuasive techniques)

Bird, came down the Walk - 

He did not know I saw -

He bit an Angle Worm in halves

And ate the fellow, raw, 

 

And then, he drank a Dew

From a convenient Grass -

And then hopped sidewise to the Wall

To let a Beetle pass -

 

He glanced with rapid eyes,

That hurried all abroad -

They looked like frightened Beads, I thought,

He stirred his Velvet Head. - 

 

Like one in danger, Cautious,

I offered him a Crumb,

And he unrolled his feathers, 

And rowed him softer Home -

 

Than Oars divide the Ocean,

Too silver for a seam,

Or Butterflies, off Banks of Noon,

Leap, plashless as they swim. 
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