Linked from
The 10 pages that link to Nectarivory, each with the reason it gives.
BeakRelated: Long, narrow beaks can reach nectar in deep floral tubes.
HematophagyCompared with: Nectarivores obtain liquid nutrients from plants rather than animal blood.
HoneyeaterRelated: Nectar is a major food source for many honeyeater species.
Bagheera kiplingiCompared with: It is another plant-derived diet, but Beltian bodies are not nectar.