The correct spelling of the word "Wheatbird" is [wiːtbɜːd]. The IPA phonetic transcription shows that the "w" is pronounced as a long "ee" sound followed by the "th" sound, which is a voiced dental fricative. The "ea" combination in the middle of the word is pronounced as a long "e" sound, and the "t" sound is followed by the "b" sound, which is an unaspirated voiced stop. The final "d" is a voiced dental stop. This spelling accurately represents the pronunciation of the word.
There is no official word "wheatbird" in the English language. However, I can provide information on the term "wheat bird", which refers to a type of bird known for its love of wheat fields.
The term "wheat bird" is a compound word formed by combining "wheat" and "bird". The word "wheat" originates from the Old English word "hwǣte", which can be traced back to the Proto-Germanic word "hwētą". This eventually evolved into the modern English term for the grain.
The word "bird" has Old English roots as well, coming from the word "brid" or "birda", which is derived from the Proto-Germanic word "ƀirdiz".