Are hummingbirds in a food chain?

No, hummingbirds are not in a food chain. They are in a food web. A food chain is a linear sequence of organisms through which nutrients and energy pass, starting with a producer organism and ending with a top predator. A food web is a more complex network of interconnected food chains, in which multiple organisms can consume and be consumed by a variety of other organisms. Hummingbirds are part of a food web that includes nectar-producing plants, insects, and other animals that consume insects.