Complex sentence: The English name of Pallas's leaf warbler commemorates the German zoologist Peter Simon Pallas who found it on the Ingoda River in Siberia in May 1772, named it as "Motacilla proregulus" when he finally published his findings in 1811.
Split into simpler sentences: The English name of Pallas's leaf warbler commemorates the German zoologist Peter Simon Pallas, who found it on the Ingoda River in Siberia in May 1772. He named the new species as "Motacilla proregulus" when he finally published his findings in 1811.