US and Canada trends for Wood Thrushes from the Breeding Bird Survey
(Sauer et al. 2011).
Long-listed on the Partners in Flight Watch List, the species is now considered threatened in Canada and “near threatened” by the International Union for Conservation of Nature (IUCN). Populations in the eastern U.S. and Canada are especially hard hit, declining by approximately 50% since the mid-1960s. Recently, declines have accelerated in northern portions of the range and at higher elevations. For example, populations in Bird Conservation Region 14 are estimated to sustain another 50% reduction within as few as 13 years if current trends continue (Stanton and Thogmartin, unpublished data). Long term, widespread declines have reduced population size by > 60% since 1968.
Declines accelerating in north, southeast, and mid-Atlantic
Thogmartin models show roughly 15-40 years until another 50% reduction from current populations depending on BCR
Further declines make reliable monitoring uncertain (i.e., BBS becomes unreliable) and reduce chances for recovery