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.
Bird. The cardinal is the only red bird in eastern North America with a crest on top of his or her head, which rises when the bird senses danger.Cardinals are not migratory and stay in the same area year-round. They form winter flocks with up to 60-70 birds.ird. The cardinal is the only red bird in eastern North America with a crest on top of his or her head, which rises when the bird senses danger.