Hummingbird
Hummingbirds are famous for their extremely small size: the length of most species fits a couple of centimeters, weight 2-4 g, even the largest species - a giant hummingbird - has a length of 20 cm, of which half is tail.
Northern species of hummingbirds reproduce in summer, tropical species all year round. The male zealously defends his plot, but limits the concern for the continuation of the genus by mating with the female, the rest of the efforts fall on her shoulders. The female builds a nest half-spherical in shape from the finest grass, wool, and even cobweb.
The nest is located on the thin ends of branches that are inaccessible to tree predators, sometimes it is attached to leaves and other suitable objects.