They are always red as far as I know.
One is red and the other is red
Cardinal
A cardinal is eight inches in length, and weight about 1.5 to 1.7 pounds. Male cardinals are bright red, while females are a much duller red.
The Summer Tanager is in the Cardinal family. It is very similar to the more familiar Northern Cardinal but lacks the crest and mask.
Male cardinals are bright red in color and female cardinals are a reddish brown.
Male cardinals are bright red with a black face and not quite as bright red beak. There can sometimes be some darker shades of red and grey on their wings. The females are not quite as bright of a red.
The male cardinal is bright red. Male birds always have the brightest colors. That is how he attracts a female. Guess the bird guys gotta be handsome to catch a lady bird.
Cardinals have a crest on the top of their heads. The male cardinal is bright red in color. The female is more muted. Cardinals stay with the same mate.
In English there are no masculine or feminine forms. English uses gender specific nouns for male or female, such as male and female.The noun 'cardinal' is a common gender noun, a word for a male or a female church official.The noun 'cardinal' is a neuter noun as a word for a type of bird or a shade of red.
Red-capped Cardinal was created in 1766.
google "food chains with the red cardinal in it"
You can buy a Red-cap Cardinal at birdexpress