An Analysis of the Bond Between Humans and Corvids

Originally published in Audubon Magazine, Summer 2026 By Elizabeth Preston

During a trip to California last summer to visit my sister, Annie, I was eager to see her new home—but I was even more keen to meet a particular neighbor she had described in detail.

Initially, this neighbor remained elusive, perhaps deterred by the noise of my children. However, a few days later, I had a direct encounter with Sal in a narrow side yard. Perched above a collection of wildflowers and succulents, Sal observed me with a level of scrutiny so blunt that it would have been considered polite rude if it had come from a human.

The Origin of an Unlikely Friendship

Annie's acquaintance with Sal began in early 2024, shortly after she and her partner, Jack, moved in. While Annie was clearing out old landscaping fabric, a crow landed on the fence, watching her with curiosity. When she pointed toward the fresh soil revealed by the tarp, the bird dove down to snag a worm.

While American Crows generally look identical to most people, Annie and Jack identified Sal by his bold personality and a distinctive hop caused by an injured leg. They began providing him with unsalted peanuts, which eventually attracted a second, shyer crow with a deformed foot.

The "Regulars" Profile

Within weeks, the couple was purchasing peanuts in bulk, using the treats to encourage regular visits. Annie often wondered if the power dynamic was reversed: Who is actually training whom?

For Annie, the crows became a highlight of her day. She would wake up to find them landing on her fence as a greeting, or she would find them perched on a patio chair while she worked on her laptop. The trust they placed in her was deeply rewarding, especially knowing that these birds had complex social lives—one neighbor even knew Sal as "Russell."

"It felt like they had these busy lives that we were fitting into."

The Biological Perspective: Affection or Opportunism?

Carl Bergstrom, an evolutionary biologist at the University of Washington, shares this experience. He has formed bonds with crows both at home and on campus, noting that these relationships fundamentally change his own habits. For example, if he forgets to bring peanuts to the university, he will actively avoid the birds.

def avoid_crows(has_peanuts):
    if not has_peanuts:
        return "Take the tunnel or sneak through buildings"
    else:
        return "Walk the main campus path"

# Current state: Bergstrom forgot the nuts
print(avoid_crows(False))

While many find joy in these connections, scientists debate whether the crows feel a reciprocal "friendship." At a basic level, humans who provide food are viewed as survival assets. Furthermore, a lawn may feel safer than an open field where a Red-tailed Hawk might strike.

The Mystery of "Gifts"

Some people report receiving "gifts" (coins, stones, or jewelry) from crows. However, behavioral ecologist Clark suggests a more pragmatic explanation:

• Juvenile Play: Young crows often carry interesting objects.
• Trade-off: A bird may simply drop an object to free its beak for a peanut.

John Marzluff, a professor emeritus at the University of Washington, adds that because the genus Corvus is incredibly intelligent—capable of using tools and solving puzzles—they may simply learn that leaving an object results in a reward.

Guide to Corvid Interaction

If you wish to attract your own avian companions, follow these guidelines:

• Choose the right snack: Use peanuts in the shell (high in protein and fat).
• Respect their space: Place the food and walk away; crows are sensitive to being stared at.
• Establish a signal: Use a consistent verbal cue.
  • Example: Bergstrom calls out, "Hello, crows!" to signal feeding time.

Warning: Be mindful that in winter, crows lose their territoriality and gather in massive flocks, which can lead to an overwhelming number of visitors.

Philosophical and Scientific Conclusions

To maintain a healthy relationship with wildlife, Clark warns against the urge to anthropomorphize. We should avoid trying to turn them into "little people" and instead appreciate them on their own terms.

However, Thom van Dooren, a field philosopher at the University of Sydney, argues that these bonds can indeed be classified as friendships. He suggests that friendship requires the ability to recognize individuals. While humans struggle to tell crows apart, crows are exceptionally good at recognizing individual human faces.

The Friendship Logic

In terms of the "value" of the interaction, we might express the crow's motivation as a function of reward and trust: $V_{interaction} = \frac{(Protein + Fat) \times Trust}{Perceived Risk}$

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