What is a striker bird?

A striker bird is a term often used to refer to certain species of birds that exhibit aggressive or striking behavior, particularly during mating or territorial disputes. One prominent example is the Eurasian Nuthatch, known for its ability to "strike" at insects and competitors. In some contexts, the term can also refer to birds that are adept at catching prey or defending their nests. Overall, striker birds are characterized by their bold and assertive behaviors.