Final answer:
The statement about mixed species flocks is false. Mixed species of birds usually eat different types of food or forage differently, thereby reducing competition, whereas single species flocks might have diet variations among individuals.
Step-by-step explanation:
The statement that mixed species flocks include several different types of birds that all eat the same food source is false. In reality, mixed species flocks usually comprise different species of birds that coexist by utilizing different food resources or foraging in different ways to reduce inter-species competition. On the other hand, single species flocks, where the members are all of the same species, might exhibit variations in their diet to minimize competition amongst themselves.
For instance, the birds in a mixed species flock might share a habitat but they will forage in different areas, or they might target different kinds of food even if the overall category is the same. In contrast, birds in single species flocks might differentiate in their feeding behaviours or the time of day when they feed to avoid direct competition for resources.