Final answer:
The specific purpose statement in question is ineffective as it tries to cover two distinct topics. An effective purpose statement for a speech should be focused on a single topic to provide clarity and depth of information. The stattement in the question is false.
Step-by-step explanation:
The statement "To inform my audience how to build a bird house and about the migratory patterns of birds" is false regarding its effectiveness as a specific purpose statement for a speech. An effective specific purpose statement should be singular and focused, aiming either to inform, persuade, or entertain. This suggested statement attempts to cover two discrete topics, which could lead to a speech that is unfocused and less impactful.
The ideal approach would be to choose one topic to ensure clarity and depth, for example, "To inform my audience about the steps involved in building a bird house suitable for local species" or "To educate my audience on the migratory patterns of regional birds". Crafting a specific purpose statement involves defining a specific purpose that narrows down exactly what you want to achieve with your speech. Including multiple main topics, as in the sample statement, could be confusing for the audience and detract from the effectiveness of the informative speech.