Complex sentence: Its relationship to other falcons is not clear; the issue is complicated by widespread hybridization confounding mtDNA sequence analyses; for example a genetic lineage of the saker falcon ("F. cherrug") is known Helbig et al.
Split into simpler sentences: Its relationship to other falcons is not clear, as the issue is complicated by widespread hybridization confounding mtDNA sequence analyses. For example, a genetic lineage of the saker falcon ("F. cherrug") is known Helbig et al.