Complex sentence: The common brimstone is a butterfly that can be commonly found throughout the Palearctic zone, with individuals seen from western Europe to east Asia, due to its high mobility, which allows it to search widely for new host plant locations and expand its range.
Split into simpler sentences: The common brimstone is a butterfly that can be commonly found throughout the Palearctic zone. Individuals have been seen from western Europe to east Asia due to its high mobility, which allows it to search widely for new host plant locations and expand its range.