The correct way to spell the two-word phrase "most bird" is "most birds." In IPA phonetic transcription, this phrase is pronounced as /moʊst bɜrdz/. The "s" at the end of "bird" and "most" indicates that it is plural. Thus, "most birds" means "the majority of birds" or "almost all birds." It's important to pay attention to proper spelling to avoid confusion and ensure clear communication.