Northern Cardinal

Overview

The Northern Cardinal (Cardinalis cardinalis) is a non-migratory songbird belonging to the family Cardinalidae. Native to North America, this species has expanded its range northward over the past century, likely due to a combination of climate change, habitat modification, and the popularity of bird feeders. The species is sexually dimorphic, with males displaying vibrant red plumage that serves in territorial displays and mate attraction, while females exhibit warm brown tones with reddish tinges on the wings, crest, and tail. Cardinals are year-round residents throughout their range, maintaining territories in woodlands, gardens, shrublands, and suburban areas. They are particularly common in areas with dense shrubby undergrowth where they forage for seeds and insects. Their loud, clear whistling songs are among the first bird sounds heard in early spring, and unusually, both males and females sing, often duetting with one another. As a synanthropic species, Northern Cardinals have adapted well to human-modified landscapes and are frequent visitors to bird feeders, especially those stocked with sunflower seeds. Their striking appearance and melodious songs have made them one of the most popular birds in North America, serving as the state bird for seven U.S. states—more than any other species. The cardinal's success in urban and suburban environments, combined with its broad diet and habitat flexibility, has contributed to stable and even increasing populations across much of its range.

How to identify

Males are unmistakable with completely brilliant red plumage, a pointed crest, black face mask surrounding the orange-red conical bill, and black throat. Females are warm buffy-brown overall with reddish tinges on the crest, wings, and tail, and share the male's distinctive crest, orange-red bill, and facial mask pattern (though duller). Both sexes are 21-23 cm in length with a wingspan of 25-31 cm. Juveniles resemble females but have dark gray-brown bills. The song is a series of clear, slurred whistles including phrases like "birdy-birdy-birdy" or "cheer-cheer-cheer," and the call is a sharp, metallic "chip" note.

Habitat

Northern Cardinals inhabit woodland edges, thickets, brushy areas, hedgerows, residential gardens, parks, and overgrown fields. They prefer areas with dense shrubby vegetation at ground to mid-level heights, often near forest edges or in second-growth woodlands. They thrive in suburban and urban landscapes with ornamental plantings and are uncommon in deep, unbroken forests or completely open grasslands.

Distribution

The species ranges from southern Canada (Ontario, Quebec, Maritime provinces) through the eastern and central United States to Mexico, Guatemala, Belize, and northern Central America. Their range has expanded northward and westward over the past century. They are found from the Atlantic coast west to the Great Plains, southwestern United States including Arizona, New Mexico, and southern California, and south through Mexico to Guatemala and Belize.

Diet

Northern Cardinals are omnivorous, with diet varying seasonally. They consume primarily seeds (including sunflower, safflower, wild grasses, and tree seeds), grains, and fruits (berries, wild grapes, dogwood, mulberry). During breeding season, they supplement their diet with insects including beetles, cicadas, grasshoppers, caterpillars, and spiders. Young nestlings are fed primarily protein-rich insects. Cardinals are ground foragers, hopping through leaf litter and low vegetation, and readily visit platform and hopper bird feeders.

Behavior

Cardinals are non-migratory and maintain territories year-round, though some individuals may make short-distance movements in response to food availability. They are typically seen alone, in pairs, or in small family groups, though they may gather in larger flocks at abundant food sources in winter. Males are highly territorial during breeding season, often attacking their own reflections in windows or mirrors. Both sexes sing throughout much of the year, with females often singing from the nest. Cardinals are primarily active during daylight hours and roost in dense vegetation at night.

Reproduction & life cycle

The breeding season extends from March through September, with pairs often raising two or more broods per season. Females build cup-shaped nests of twigs, bark strips, grasses, and rootlets in dense shrubs or small trees, typically 1-4 meters above ground. Clutch size is 2-5 eggs (typically 3-4), which are grayish or greenish-white with brown or purple spots. Females incubate eggs for 11-13 days while males bring food. Both parents feed nestlings, which fledge at 9-11 days but remain dependent on parents for 25-56 additional days. Cardinals are mostly monogamous, with many pairs remaining together year-round. Juveniles reach sexual maturity at one year of age.

When to look

Year-round resident throughout range; most vocal and visible during breeding season (March-September); particularly conspicuous in winter when males' red plumage contrasts with snow. Best observed at bird feeders during early morning and late afternoon throughout the year.

Cultural significance

The Northern Cardinal is the official state bird of seven U.S. states: Illinois, Indiana, Kentucky, North Carolina, Ohio, Virginia, and West Virginia. It appears on countless Christmas cards and winter decorations, symbolizing hope and beauty during cold months. In some traditions, seeing a cardinal is thought to represent a visit from a deceased loved one. The bird's image is widely used in sports team logos, including the St. Louis Cardinals and Arizona Cardinals. Native American tribes associated the cardinal with relationships, courtship, and monogamy. The species is protected under the Migratory Bird Treaty Act.

Similar species

• Pyrrhuloxia (Cardinalis sinuatus)
• Summer Tanager (Piranga rubra)
• Hepatic Tanager (Piranga flava)

Watch on YouTube