What is thistle seed and how is it used in bird feeding?

Thistle seed, also known as nyjer seed, is a small black seed that comes from the African yellow daisy plant. It is a favorite food for finches and other small birds due to its high oil content and nutritional value. Thistle seed is typically used in bird feeders specifically designed for small-seed eating birds, such as finch feeders. By offering thistle seed in these feeders, bird enthusiasts can attract a variety of colorful finches to their yards for observation and enjoyment.