Complex sentence: Other nocturnal lemurs are sympatric with fork-marked lemurs, and in western Madagascar, interspecific competition is reduced by restricting activity to specific levels of the canopy, such as using only the highest sleeping sites at least above the ground.
Split into simpler sentences: Other nocturnal lemurs are sympatric with fork-marked lemurs. In western Madagascar, interspecific competition is reduced by restricting activity to specific levels of the canopy, such as using only the highest sleeping sites at least above the ground.