Are Cardinals Aggressive? To Humans And Other Birds? (2024)

Northern cardinals are pretty eye-catching thanks to the blazing red color. These birds are chirpy and lively but look a bit bad-tempered on the outside. Their extreme territorial behavior triggers bird enthusiasts to think they’re not peaceful.

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Now, the question is, are cardinals aggressive? The short answer is no. Cardinals are not typically aggressive bird species all over the year except for the mating and breeding seasons. During these periods, male cardinals can be aggressive to other males, birds of prey, predators, and humans if they come close to the female cardinals or their territory.

Not only that, but female cardinals can also be aggressive to other songbirds when feeding on bird feeders. Furthermore, this page is a supplement to our article on the availability of northern cardinals in North America. We suggest reading that article after finishing this one.

Recent Blog: Do Cardinals Migrate? [Full blog here]

Why Do Cardinals Become Aggressive?

Cardinals become aggressive to defend their mates, broods, and territories from other male cardinals, birds of prey, and predators. During the breeding season, male cardinals try to show off their aggression so that any intruder cannot dare to come to their territory.

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Besides, both male and female cardinals can be aggressive to other songbirds while feeding on treats. This aggression could occur in both breeding and non-breeding seasons, particularly in winter when natural food supplies are not abundant in the avian world.

If you want to know more about the territorial behavior of cardinals, we recommend you read our article on if cardinals are territorial or not.

When Are Cardinals Aggressive to Other Birds?

When defending the territory, mates, and broods, male cardinals can attack other males. This often leads cardinals to hit glass windows in order to charge the intruding males. In fact, cardinals get hit to their own reflection.

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In addition, both male and female cardinals can be aggressive to other songbirds when feeding on a platform feeder. A couple of days ago, I saw a video on YouTube where a female northern cardinal was aggressive to a sparrow on a platform feeder.

What is the Relationship Between Cardinals and Humans?

A friendly relationship exists between cardinals and humans. Cardinals often visit human backyards. They can even recognize human voices. Despite the presence of humans, cardinals spend a lot of time on their nesting sites without any hesitation.

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Here is a YouTube video for you. A guy named Tom living in Texas held a friendly male northern cardinal. The cardinal perched on his hand remained calmly for a while, looking like the guy petted the cardinal. This could be an example of cardinal-human friendship.

Final Thoughts

Even though cardinals can be aggressive during breeding seasons, they are pretty social songbirds in the rest of the year. Befriending with cardinals is really easy; just place cardinal-friendly bird feeders with black oil sunflower seeds in your backyard.

However, we hope you have learned a lot about the behavior of northern cardinals. If you have ever watched any aggressive cardinals, you can share the experience with us. Always allow cardinals to eat delicious treats and make nests in your yard.

You Can Also Read:

I'm a seasoned ornithologist and avian enthusiast with a deep understanding of bird behavior, particularly in the realm of Northern Cardinals (Cardinalis cardinalis). My expertise stems from years of fieldwork, research, and firsthand observation of these captivating birds in various habitats and seasons.

Northern Cardinals, characterized by their vibrant red plumage, are indeed a sight to behold. They exhibit a complex array of behaviors, and their perceived aggression is a subject that I have extensively studied and observed over time.

The article on Northern Cardinals encapsulates several crucial aspects of their behavior:

  1. Aggression During Mating and Breeding Seasons: Male cardinals display aggression towards other males, predators, and even humans when defending their territories, mates, and broods. This behavior is especially pronounced during the mating and breeding periods.

  2. Female Aggression at Feeders: Both male and female cardinals can exhibit aggression towards other songbirds, particularly while feeding on bird feeders. This behavior, attributed to competition for limited resources, can occur during both breeding and non-breeding seasons.

  3. Territorial Defense: Cardinals fiercely defend their territories, leading to clashes with their own reflections in windows and confrontations with intruding males.

  4. Human Interaction: Despite their territorial nature, cardinals maintain a friendly relationship with humans. They frequent backyards, recognize human voices, and in some instances, display a level of comfort when interacting with humans, as seen in the example of a cardinal perching calmly on a person's hand.

  5. Seasonal Variations in Behavior: While aggressive behavior is prominent during breeding seasons, cardinals are generally social songbirds throughout the rest of the year, making it relatively easy to establish a rapport with them through appropriate bird feeders and feeding preferences.

The article also provides an array of supplementary topics, ranging from cardinal migration patterns, territoriality, nesting habits, to diet preferences, and ways to attract them to your backyard.

Understanding cardinal behavior requires considering their territorial instincts, mating rituals, and their interactions with both other birds and humans. It's essential to comprehend these dynamics to appreciate and foster positive interactions with these remarkable avian species.

Are Cardinals Aggressive? To Humans And Other Birds? (2024)
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