A scientist wants to study the interactions of different birds in the southern part of a desert. What should the scientist do first?

Before studying how different birds interact, the scientist needs to know which species are present. A dichotomous key helps identify each bird species using observable traits, so the scientist can then investigate their interactions. Learning local names, diets, or migration patterns may be useful later, but none identifies the species as directly.

AI-written and checked against the verified answer.