DONALD R. WHITEHEAD’s scientific contributions

... The fact that Acadian flycatchers occur in areas with no hemlock forest in their breeding range (Allen et al. 2020), showed no difference in nesting success between hemlock and hardwood areas (Becker et al. 2008), and have a preference for different forest types in the southern part of their range (Whitehead and Taylor 2002) might suggest their flexibility to explore alternative habitats if hemlock stands are lost or decline in quality following adelgid infestation. A similar pattern was suggested for black-throated green warblers in Kentucky: the species is associated with other types of coniferous habitat throughout their range, and that can buffer severe bird decline in some areas of the state (Brown and Weinkam 2014). ...

Reference:

Quantifying regional-scale impacts of hemlock woolly adelgid invasion on North American forest bird communities