What geographical region is the breeding ground for the subspecies *P. t. yakutensis*?
Answer
Eastern Siberia
The subspecies designated as *P. t. yakutensis* represents the easternmost breeding population of the Willow Warbler. These birds originate specifically from eastern Siberia, a vast area extending the species' Palearctic breeding range significantly eastward. Following their breeding period, this specific group undertakes the longest known migrations among the three recognized subspecies, ultimately wintering in areas located in Eastern and Southern Africa, highlighting their exceptional migratory endurance.

Related Questions
Which naturalist first cataloged the species as *Motacilla trochilus* in 1758?What is the literal meaning of the genus name *Phylloscopus* derived from Ancient Greek words?What geographical region is the breeding ground for the subspecies *P. t. yakutensis*?How is the Willow Warbler's song characterized in contrast to the Chiffchaff's call?What was the initial binomial name given to the species by Carl Linnaeus?Which broader family name was the *Phylloscopidae* family historically subsumed within?What pattern describes the change in plumage color across Willow Warbler subspecies from west to east?Who introduced the genus *Phylloscopus* to which the Willow Warbler now belongs?To which vast order of birds, representing all perching birds, does *P. trochilus* belong?What is the meaning of the Ancient Greek specific epithet *trochilus*?