The terms vibrato and tremolo are sometimes incorrectly used interchangeably, although (in the classical world) they are properly defined as separate effects with vibrato defined as a periodic variation in the pitch (frequency) of a musical note, and tremolo as a fast repetition of the same note (usually a semiquaver) in order to produce the audible ...
The cardinal is easy to spot due to its coloring. It is one of the most popular birds and easily identified by birdwatchers and non-bird-watchers alike. Like the robin, whose plumage also features a distinctive red patch, the cardinal is often associated with Christmas and the winter season.
Northern Cardinal - Cardinalis cardinalis. The cardinal is about eight inches in length. It has a black mask on its face; a crest on its head; and a short, cone-shaped bill. The mask on the female is usually lighter than the mask on the male. Cardinals are known for their bright red color, but only the male is red. The female is a dull brown or olive color with dull red on her wings and tail. The northern cardinal can be found in most parts of United States east of the Rocky Mountains. It is also found in parts of Arizona, California and New Mexico. The range of the cardinal has increased in the last 50 years to include New York and New England.