After work today I headed over to the Mount Holyoke Range SP to follow up on a report of a Cerulean Warbler singing a Black throated Blue Warbler song. It was reported in the same area I had one singing both Black throated Blue Warbler and Black and White Warbler songs back in 2021. I hiked up to the spot and along the way had a number of warblers including at least three Worm eating Warblers. Once I arrived I started listening and after a few minutes heard a Black throated Blue Warbler song and suspected that was the Cerulean Warbler. I spent several minutes looking with no luck and then it flew in closer and it was indeed a Cerulean Warbler. I got a few recordings and some photos but failed to get a video of it singing despite some effort. As I watched it move around from tree to tree it then switched songs and started singing a Black and White Warbler song! Just like the individual I had in 2021. It seems very likely it is the same individual but this raises the question of where it has been the last couple years, among a few other questions. I got a few videos with one attached here: Cerulean Warbler singing Black and White Warbler song video. Such a unique bird and glad to see it back again although I suspect it will have lots of difficulty attracting a mate singing these songs. There was no sign of hybridization with the bird and looked fine for a typical Cerulean Warbler. Although far from common I have another Cerulean Warbler at Quabbin that has consistently been singing a Northern Parula song. I'll do a much more in depth post on these individuals at some point once the breeding season is over and I have some extra time.
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