Birdwatching or birding is the observation and study of birds with the naked eye or through a visual enhancement device like binoculars. Birding often involves a significant auditory component, as many bird species are more readily detected and identified by ear than by eye. Most birdwatchers pursue this activity mainly for recreational or social reasons, unlike ornithologists, who engage in the study of birds using more formal scientific methods.

As the numbers of birdwatchers increases, there is growing concern about the impact of birdwatching on the birds and their habitat. Birdwatching etiquette is evolving in response to this concern. Some examples of birdwatching etiquette include promoting the welfare of birds and their environment; avoiding stressing the birds by limiting use of photography and playback devices; keeping back from nests and nesting colonies; and respecting private property. The lack of definite evidence, except arguably in the form of photographs makes birding records very difficult to prove but birdwatchers strive to build trust in their identification. One of the few major disputes is the case of the.