Topic: Earl Lincoln Poole, small watercolor painting 20th Century American

The image attached has been attributed to the American artist Earl Lincoln Poole. I am trying to confirm that attribution. Here are the details:
Subject of painting: Falco_tinnunculus
Sheet dimensions: 8"x13"
Length of bird: 7"
Artiist: attributed Earl Linclon Poole
Signature: None
Medium: Watercolor
Reverse of sheet: blank
Provenance: Purchased from Stubbs Gallery New York City liquidation sale in 1992.
Thank you.

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