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Usha

Loon question..common vs yellow billed

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Saw this very deep diving loon today in maricopa county, Arizona. Saw it come up only once in 30 minutes when I took photos. Bill looked yellow but thought it was because of morning sun. Common loons are there and saw a few. Since this loon was a deep diver, went back to same location and spent 45 minutes only to see it dive but didn’t spend much time on water to get photos. Enclosing photos I took the very first time I saw it. I am thinking it could be yellow billed based on photos but it would be mega rare here. Appreciate any comments,suggestions,ID.

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8A901D8D-5EEB-4CD8-9118-003D7E79E83A.jpeg

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This is a Common, for the following reasons:

  1. Entirely dark culmen (vs outer half of bill of a Yellow-billed Loon entirely pale)
  2. Decurved culmen (vs straight/recurved on a Yellow-billed)
  3. Small amount of chin feathering (vs greater anterior extension of chin feathering in Yellow-billed Loon, until posterior edge of nostril)
Edited by akandula
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5 minutes ago, akandula said:

This is a Common, for the following reasons:

  1. Entirely dark culmen (vs outer half of bill of a Yellow-billed Loon entirely pale)
  2. Decurved culmen (vs straight/recurved on a Yellow-billed)
  3. Small amount of chin feathering (vs greater anterior extension of chin feathering in Yellow-billed Loon, until posterior edge of nostril)

Thank you 

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