Speciation and rapid phenotypic differentiation in the yellow-rumped warbler ( Dendroica coronata) complex. Ecomorphology of migratory and sedentary populations of the yellow-rumped warbler ( Dendroica coronata). Biological Journal of the Linnean Society, 103:696-706.īrelsford, A., B. A cryptic contact zone between divergent mtDNA lineages in southwestern North America supports past introgressive hybridisation in the yellow-rumped warbler complex (Aves: Dendroica coronata). The Auk: Ornithological Advances, 133:698-717. Genomic variation across the yellow-rumped warbler species complex.
A comparison of genomic islands of differentiation across three young avian species pairs. We have also documented interesting ecomorphological differences between the forms, driven largely by wing-shape adaptations to migratory or sedentary lifestyles. Thanks to genome-wide markers we now know that all four lineages are quite distinct and likely represent different species. Due to recent genetic testing, they soon may be split and again be treated as two different species. The eastern Myrtle and western Audubon forms were once considered separate species. However, more recent work by us and collaborators Alan Brelsford and Darren Irwin (University of British Columbia) using nuclear DNA markers has revealed that shared mtDNA between Myrtle and Audubon’s warblers is the result of past introgression, and the two represent very divergent lineages when the entire genome is taken into account. Able to digest 80 of wax-coated berries such as bayberries, the Yellow-rumped Warbler is capable of wintering farther north than any other warbler.
Early genetic studies using mitochondrial DNA revealed divergent Mexican and Guatemalan lineages relative to the closely related Myrtle and Audubon’s warblers. The complex is composed of a white-throated form, Myrtle warbler in Eastern North America, and three yellow-throated forms: Audubon’s, Black-fronted and Goldman’s warblers in Western North America, Northern Mexico, and Guatemala, respectively.
AUDUBON YELLOW RUMPED WARBLER PLUS
I’m in a bit of a funk so if I don’t publish posts for a day or two not to worry I might just be taking a short break.Ĭlick here to see more of my Yellow-rumped Warbler photos plus facts and information about this species.For more than a decade now we have been investigating the evolutionary history of the yellow-rumped warbler Setophaga coronata (formerly Dendroica coronata). Out here in the West we have Audubon’s Yellow-rumped Warblers and back East they are Myrtle Yellow-rumped Warblers, they may be split into two species again soon, or at least there have been rumors about that for some time. The plumage of this species is a bit more subdued in the fall than it is during the spring but I still find them very appealing to my eyes.Īudubon’s and Myrtle Warblers were considered separate species for decades before being lumped by the AOU in 1973. I photographed this Yellow-rumped Warbler last fall up in Box Elder County where I spotted it perched in a hackberry bush next to a gravel road.
I may just have to wait for spring to get the images of these warblers that I dream of.
I also used to see them way up north but I didn’t spend as much time up there this year during the time that they were migrating through. There was a spot close to home that used to have a tree that was just dripping with them during fall migration but that tree has completely died and I don’t think it has the draw for these warblers that it used to have since there aren’t any leaves for insects to hide in. I seem to have missed out on seeing lots of Yellow-rumped Warblers this year during their fall migration, I saw a few back in late September and early October but haven’t seen any for some time.
AUDUBON YELLOW RUMPED WARBLER ISO
Audubon’s Yellow-rumped Warbler during fall migration – Nikon D500, f7.1, 1/1000, ISO 500, Nikkor 500mm VR with 1.4x TC, natural light
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