What birds eat sap?

* Hummingbirds (Trochilidae)

* Woodpeckers (Picidae)

* Creepers (Certhiidae)

* Nuthatches (Sittidae)

* Chickadees (Paridae)

* Titmice (Paridae)

* Warblers (Parulidae)

* Tanagers (Thraupidae)

* Honeycreepers (Drepanididae)

* Flowerpeckers (Dicaeidae)