HummingBird

Humming Birds
Hummingbirds are birds native to the Americas and constituting the biological family Trochilidae. They are the smallest of birds, most species measuring 7.5–13 cm (3–5 in) in length. The smallest extant hummingbird species is the 5 cm (2.0 in) bee hummingbird, which weighs less than 2.0 g (0.07 oz). The largest hummingbird species is the 23 cm (9.1 in) giant hummingbird, weighing 18–24g (0.63–0.85 oz).

Biome/Spawn
The Swallow-tailed hummingbird (Eupetomena macroura) is vivid neon green and azure and spawn on Jungle and Jungle Hills biomes, they are not hard to find, flying high as 20 blocks most of times; 20% chance (1-5 birds).

The Anna's hummingbird (Calypte anna) is neon green with magenta pink head and spawn on Forest and Forest Hill biomes; 22% chance (1-5 birds).

The black jacobin (Florisuga fusca) is black with a white tail, and spawn on Forest and Jungle Hills biomes; 20% chance (1-5 birds).

The Allen's hummingbird (Selasphorus sasin) is orange with a brown back and spawn on Beach biome; 20% chance (1-5 birds).

Behavior
HummingBirds are fast flying creatures, and its rare to see them landing, hard to catch, they can make nice decorations on cages, or just living free near the player house. They have curiosity and sometimes will fly near the player and look at him, they also like water and sometimes you can see them touching the water surface, they panic when attacked.

Features
Humming birds cannot breed yet, but there are features planed for them on the future. On version 2.3 the models of the humming bird were updated and the long tailed ones have a different model.