Complex sentence: Duikers are very shy, elusive creatures with a fondness for dense cover; those that tend to live in more open areas, for example, are quick to disappear into thickets for protection.
Split into simpler sentences: Duikers are very shy, elusive creatures with a fondness of dense covers. Bush duikers that tend to live in more open areas, for example, are quick to disappear into thickets for protection.