The term 'Red Bird' can refer to two different species of birds. The first is the CARDINAL, which is an 8 letter word. Cardinals are a type of songbird that are found in North and South America. They are known for their bright red plumage and distinctive songs. The second is the TANAGER, which is a 7 letter word. Tanagers are a type of tropical bird that are found in Central and South America. They are also known for their bright red plumage, but they have a more slender body shape than Cardinals.