Exercise 2 solution (sample answer)

The Life list article says each person decides what counts. Some count only birds they see; others accept a bird heard. It says no one can verify another person's list, so it relies on the honour system, and that adding birds seen only online or in film is generally discouraged.

So the friend's documentary eagle would normally not count. For your own list, decide your rules in advance and write them on the first page of the notebook (for example "seen or heard in the wild, identified by me, or confirmed by a reliable companion"), then apply them consistently.