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I am wondering it this is either a 3rd year western gull or a western-ring-billed hybrid. The mostly white head separates it from a 3rd year lesser black-backed, I believe. It's the bird lying down on the right, with many ring-billeds. Hard to see, but it has a black back. thank you!

Population of the northern savannah expression of Quercus coccinea growing on acid sandy loam with aspen, white birch (a few Bur Oak) in a tall grass prairie ecosystem in Minnesota.
Included is a Discriminant Functions Statistical Analysis centroid graph of 25 populations of Northern Pin and Scarlet Oak across eastern US including Minnesota . Morphology of buds, twigs, leaves, and acorns were examined. Morphological distance was noted with Black ((velutina) and Pin Oak (palustris). Quercus ellipsoidalis and Quercus coccinea group as one species not two.

Diagnostic characters of Quercus coccinea seen in this tree and population include:

• 5mm Pubescent tipped buds

• 20+mm acorn cupules with glossy orange acuminate bract scales
  *Gray outer bark with. reddish inner bark

• Glossy Scarlet leaves with C-shaped sinuses
• Concentric pitting and rings are found in this population but most typical of southern Quercus coccinea populations but are frequently lacking in trees growing in the northern parts of its range.

I have mastered a few species of owl calls. So we were out calling at a boat ramp that we have previously called them in. We got lucky enough to get two individuals to respond to my call.
Recorder-Zoom F1
Mike-Zoom sgh-6.