Fox Sparrow intergrade ('Red Fox Sparrow' x 'Sooty Fox Sparrow'),
The group of Fox Sparrow taxa known collectively as 'Red Fox Sparrow' and the group known as 'Sooty Fox Sparrow' are sometimes treated as distinct species, although they are not currently recognised as such by the main authorities. Steve informs us that the two groups' breeding ranges meet in Alaska and cross-breeding is known to occur (and is under-appreciated). He goes on to say about this bird:
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Fox Sparrow intergrade ('Red Fox Sparrow' x 'Sooty Fox Sparrow') (same bird as in photo ID 1367 above),
Fox Sparrow Passerella iliaca
'Red Fox Sparrow' Passerella iliaca iliaca-group
'Sotty Fox Sparrow' Passerella iliaca unalaschensis-group
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