Which birds do not build stick nests?

True Falcons, which belong to the family Falconidae, are known for their unique nesting habits compared to other birds of prey. Unlike Accipiters, Buteos, and Eagles, which often construct elaborate nests from sticks and other materials, True Falcons typically nest in more straightforward locations such as ledges, cliff faces, or even abandoned structures. They might use very few materials, if any, to line their nests, relying instead on the natural substrate of their chosen nesting site.

This behavior is in part due to their hunting tactics and lifestyle. True Falcons are agile fliers and are often adapted to open habitats, where suitable nesting sites may not offer abundant vegetation for stick construction. Their nesting strategy requires less construction effort, allowing them to utilize locations that can provide safety from predators while also being strategically placed for hunting.

In contrast, Accipiters, Buteos, and Eagles tend to have greater reliance on stick nests, often building large and complex structures in trees or other elevated settings. These nests can support larger brood sizes and provide additional protection from environmental factors.