Don't take my word for it. Here's eBird: <https://lh3.googleusercontent.com/-UUK5L0rkjLc/VxFPY7RVqAI/AAAAAAAAV6Q/N5S5paO10lYPNy2-4f6GCA-Sgb00xGlOACLcB/s1600/YRWa%2Bdata.png>
That's right, we're at that time of year when the Yellow-rumped Warbler complex is on the move in Colorado. Earlier today at Walden Ponds, Boulder County, Hannah Floyd and I saw all four eBird taxa for this complex: *Yellow-rumped Warbler, Yellow-rumped Warbler (Myrtle), Yellow-rumped Warbler (Audubon's), and Yellow-rumped Warbler (Myrtle x Audubon's).* By carefully noting and eBirding these taxa, we birders can valuably contribute to scientists' understanding of the timing of migration in this fascinating multi-taxon complex. Many at this time of year can be assigned to the two parental taxa (Myrtle and Audubon's), but others will be left simply as "Yellow-rumped." These can be either birds not seen well enough or birds seen well but deemed to be indeterminate. Particularly cool are the hybrids, the adult males of which are fairly easy to recognize. Here are grainy but diagnostic photos of a hybrid we saw today at Walden Ponds: <https://lh3.googleusercontent.com/-QM_N4zHPwLo/VxFPNKge_KI/AAAAAAAAV6A/sRuQez5BLjMO56RRrJLd_VP4h96EI48oQCLcB/s1600/YRWa%2B1144a.png> <https://lh3.googleusercontent.com/-urldbeyWFfM/VxFPSdLJ8II/AAAAAAAAV6I/bWkbeDZUlu49l1BRu9e6Mbtw3Xj64QLQACLcB/s1600/YRWa%2B1144b.png> Other stuff at Walden today: FOY Solitary Sandpiper, Northern Rough-winged Swallow, and Savannah Sparrow; Wood Ducks; a vocal White-throated Sparrow; and a free-range Red Junglefowl. Ted Floyd Lafayette, Boulder County -- You received this message because you are subscribed to the Google Groups "Colorado Birds" group. To unsubscribe from this group and stop receiving emails from it, send an email to cobirds+unsubscr...@googlegroups.com. To post to this group, send email to cobirds@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/cobirds/66bdfb6d-ad76-4093-a0f0-4ae95edf723b%40googlegroups.com. For more options, visit https://groups.google.com/d/optout.
