1. Nectar: Some Hawaiian birds like the Hawaiian Honeycreeper (Drepanidinae family) feed on nectar from native Hawaiian flowers and fruits. Their long, curved beaks are specially adapted for reaching and extracting nectar.
2. Insects: Many baby birds eat insects, such as caterpillars, flies, spiders, and beetles, which they catch in mid-air or glean off leaves and branches.
3. Fruits and Berries: Some birds, including species of Hawaiian Thrushes (Myadestes), feed on fruits, berries, and soft pulp. They use their beaks to peck at the fruit and extract its contents.
4. Seeds: Certain birds, like the Apapane (Himatione sanguinea) and the Akepa (Loxops coccineus), consume seeds from various plants and trees found in Hawaiian ecosystems.
5. Small Vertebrates: Some birds, such as the Io (Buteo solitarius), a Hawaiian hawk species, prey on small vertebrates like lizards and small rodents.
It's important to note that the specific diet of baby Hawaiian birds can vary depending on their species, habitat, and food availability. Some species may have specialized diets, while others may be more opportunistic and feed on various food sources.