Nowadays, homeowners are including hybrid and exotic hollies in their home landscapes more often than American holly (Ilex opaca). However, if you are interested in adding an attractive evergreen tree that bears shiny red fruit that is relished by 29 species of birds, you would be better off, planting America holly than an exotic or hybrid holly.
In addition, American holly berries typically have more nutritive value than the berries of nonnative hollies. This can be critical for birds that birds that forage for food throughout the winter.
While some hybrid cultivars may be an exception to that rule, based on my experience the berries found on other hollies are often ignored or only eaten when American berries have all been eaten.
Another reason why the berries found exotic and hybrid hollies are not consumed as often as American hollies – they are too large for some birds to swallow.
Finally, American holly is an important addition to backyards because it serves as the primary host plant for the Henry’s elfin butterfly and is often used a host plant for the holly sallow moth.