Complex sentence: The much smaller males scamper from flower to flower in search of females, and are often seen missing one or more of their legs, either to near-misses by predators such as birds, or to fighting with other males.
Split into simpler sentences: The much smaller males scamper from flower to flower in search of females and are often seen missing one or more of their legs. This may be due to either near-misses by predators such as birds or to fighting with other males.