The Prothonotary Warbler is known as the “Gold and Silver Bird” and it is indeed a brilliant sight. Females are a duller version of the male. His song is a distinctive ringing tweet, tweet, tweet, tweet with all notes on the same pitch. Prothonotaries are the only eastern warbler to use tree cavities for their nests. They make 2 nests during the Summer at ROFF in the North Fork riparian vegetation.