Cerulean Warbler, male, migrant on Sanibel Island this afternoon. I was lucky to get any photos as this is a treetop warbler.
He stayed high in the trees and mostly this is the view birders got.
Or this view of the underside.
Cerulean Warblers are not commonly seen here on Sanibel. They winter in South America, so this bird had flown quite some distance. They breed mainly in the middle of the eastern part of the U.S. in tall deciduous trees with open understory, eating insects they glean from leaves. Ceruleans are a species of high concern in the East, due to its small population size. It is being considered for becoming listed as an Endangered Species. We feel lucky to have seen it.