Can Birds eat ...?
Food safety index

Avocado is toxic to birds. The persin in the fruit, skin, pit and leaves can cause sudden heart and breathing failure, and pet birds are extremely sensitive.

Raisins pose a serious toxic risk to birds and should never be offered as a treat or food supplement. While the exact mechanism in avian species is not as thoroughly documented as in dogs, raisins contain concentrated compounds — including high sugar loads, possible mycotoxins, and an unidentified nephrotoxic principle — that can overwhelm a bird's extremely sensitive and small-volume metabolic systems. Avian veterinarians consistently advise against feeding any grape-derived product, including raisins, to pet or wild birds.

Apple flesh is generally safe for most pet birds in small, well-prepared portions, but the seeds, core, and stem contain amygdalin — a cyanogenic glycoside that releases hydrogen cyanide when metabolized. A bird's tiny body mass means even a few seeds pose a disproportionate risk. Served correctly (peeled, cored, seeded), apple is a nutritious occasional treat.