Many bird groups not only organize excursions, but also often activities in the evenings. From experience Jan knows these groups are always looking for subjects. In the past, Jan provided on request evenings by holding a so called mystery quiz. The phenomenon is known at almost all organized birdwatchers. By showing images of bird species but which are partly visible, one must use his or her knowledge to guess which species is shown.
It is possible to organize such a quiz on request. The difficulty will lie between those of beginners to a bit more advanced birders.
This presentation takes about two hours.