Thanks, Gilman (in Paso Verde, CA)
Right, which photo is the Orange-crowned? Tennessee?
Warbler identification challenges are ALWAYS the leading questions I get in the spring.
So here's ten typical “double-take” ID challenges you’re likely to encounter when the going gets tough on the boardwalk as the warbler march begins:
(i.e., Knowing the breeding ranges and which habitats the following species tend to frequent and/or nest within is always helpful in identifying look-alikes from each other – among other factors.)
1. Chestnut Sided and Golden-Winged
2. Magnolia and immature Prairie
3. Black-throated Green and Townsend’s/Hermit hybrids
4. Yellow-throated and Grace’s
5. Kirtland’s and Palm (and Prairie)
6. Yellow-Rumped (Audubon’s subspecies vs. Myrtle subspecies) (and intergrades of Audubon’s and Myrtle occur in portions of British Columbia and Alberta)
7. Tennessee and Orange-Crowned
8. Ovenbird and Northern Waterthrush (or Louisiana Waterthrush (they are all in the same genus)
9. Connecticutt and Mourning
10. Mourning and MacGillivray’s