Regulidae

The family Regulidae, commonly known as kinglets, comprises six species of small songbirds. Despite their tiny size, weighing less than 10 grams, they are remarkably active and resilient, capable of surviving cold climates by constantly flitting and flicking their wings. These birds, typically found in coniferous woodlands, have round bodies and short bills. They construct high-hanging nests from moss and cobwebs, often so small that their 5–10 eggs are laid in two layers. Kinglets measure about 9 cm (3.5 inches) in length, with greenish-gray plumage and distinctive bright crown marks. The golden-crowned kinglet of North America and the goldcrest of Eurasia are often considered the same species, both featuring a crown patch bordered by black, which is red in males and yellow in females.1