Do Crows Steal Other Birds’ Nests? The Shocking Truth
By Erick Updated 9 min read
On this page (8 sections)
In short: Yes. Crows commonly take eggs and kill nestlings from other birds. They target open-cup nesters such as robins, cardinals, wrens, and doves during the breeding season. Observers report most raids remove one to several eggs at a time, though exact counts depend on species and nest size. Some of the raid-size numbers below are based on field observations and birder reports rather than controlled experiments.
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Crows remember yards with active nests and return repeatedly during nesting season. Local patterns depend on food, cover, and human activity.
| Eggs taken per raid | Often one to several; varies by egg size and nest accessibility (anecdotal reports) |
|---|---|
| Peak raiding season | Local spring to mid-summer, varies with latitude and species |
| Nests harmed per crow family | Can range from a few to many nests in a season; depends on local density and food |
| Raid frequency | Observers often see repeat visits every few days, but intervals vary |
| Most vulnerable height | Low to mid-level shrubs and small trees are often targeted |
| Scare tactic effectiveness | Often short-lived; effectiveness drops rapidly as crows learn |
The short version
- Raids peak during local songbird breeding seasons, often spring through midsummer depending on region
- Observers report that crow families can depredate multiple nests in a season; totals vary from a few to several dozen in some neighborhoods
- Nests that are low, exposed, or visible from perches face higher risk in many settings
- Fake predators and scare devices often lose effectiveness after a few days once crows learn they are harmless
- Mobbing calls from neighborhood birds often indicate a raid in progress
What crows actually take from nests
Crows take eggs and they kill small nestlings. Which they take depends on nest stage and ease of access. They may eat eggs on site or carry them off to a perch before feeding.
Field observers report seeing broken shells near nests when crows fed on eggs on the spot. If shells are torn and scattered, the bird likely ate there. If shells end up on a perch, the crow probably carried the egg away. You can use shell placement to infer what happened locally.
Crows do not usually steal nest material for their own nests. Empty nests often mean the contents were removed. Another bird may reuse the old structure later, which can look like one species replaced another quickly.
Do crows steal eggs from other birds
Yes. Crows take eggs and nestlings from other birds when the opportunity appears. They scout yards and patches of trees for active nests. When a nest is unguarded, crows may remove eggs in a single visit. They also return to the same area if those visits yield food. Watch a yard for repeated, quick visits to spotting where raids happen most often. There is more on blue jays attacking nests in a separate guide.
Local conditions set how often raids happen. High crow numbers, few hiding places for nests, and easy access to nests raise the odds. Human feeders and open lawns can make nests easier to find. Time of year matters too: most losses occur during the local breeding season. To judge risk in your yard, count crow visits to nearby trees during early morning and late afternoon for a week.
Crows learn. Parent crows teach young routes and which yards pay off. Once a pair or family finds reliable nests, they return for weeks. That creates hotspots where several nests can be lost in one season. You can reduce that risk. Move feeders, add dense cover for nests, or place nest screens on vulnerable boxes. Early detection and small changes cut the number of successful raids.
Why crows raid songbird nests
Eggs and nestlings are high-value food. They provide concentrated protein and fat at a time when corvids are feeding young. Quantifying that value precisely requires lab work. General avian nutrition sources describe eggs and nestlings as rich, easy-to-carry resources compared with scattered insects. If that sounds like your situation, read up on blackbirds egg stealing behavior next.
Predation also reduces competitors for some food resources in a local area. That point is a logical ecological effect rather than a claim of intent. Crows that succeed at raiding a yard will often revisit it because the immediate payoff is reliable.
Learning increases impact. Young crows follow adults and copy behavior. Over several seasons this creates persistent pressure in some neighborhoods. How strong that pressure becomes depends on local habitat, food availability, and human behavior.
- Eggs and chicks are concentrated calories compared with dispersed insects
- Reduced local competition is a side effect rather than malicious intent
- Behavior spreads when juveniles observe and copy adults
- Open, exposed nests offer easy targets compared with hidden or cavity nests
Which birds lose nests to crows most often
Open-cup nesters that place nests in exposed shrubs or forks of small trees often face higher risk. American robins typically build open cups in visible locations and are often mentioned in depredation reports. Nest height, cover, and the surrounding perch options for crows matter a lot. If that sounds like your situation, read up on impact of starlings on other birds next.
Shrub-nesting species such as cardinals and mourning doves also appear in many reports because their nests are visible from above when crows perch nearby. Cavity nesters such as bluebirds and chickadees generally suffer fewer losses if boxes are properly designed and placed.
Ground-nesting species lose nests if discovered. Their camouflage helps reduce detection, but once found they have little defense. Local conditions change which species are most affected.
| Species | Typical nest height | Nest visibility | Typical risk |
|---|---|---|---|
| American robin | Variable, often 5-15 feet | High, open cup | Often higher risk in suburban yards |
| Northern cardinal | Low to mid shrubs | Medium, visible from perches | Moderate to high in some habitats |
| Mourning dove | Low to mid trees or shrubs | High, flimsy platform | Moderate risk |
| House wren | Cavities or dense cover | Low if well concealed | Lower risk if cavity; higher if exposed |
| Eastern bluebird | Cavity boxes | Low if box properly made and mounted | Low when boxes meet recommended specs |
When and how crow nest raids happen
Raids often occur early in the day when parent birds leave the nest to forage. Observers commonly see attacks in the morning, but timing varies with local conditions. People in this spot often ask about birds stealing eggs as well.
A raid can be quick. A crow lands, grabs eggs or nestlings, and departs in under a few minutes in many cases. Alarm calls and mobbing from nearby birds usually signal a raid. Watching those calls helps you detect problems without disturbing the nest.
Crows sometimes check productive nests every few days. The interval depends on how successful they were, whether the parents replace the clutch, and local food availability. Some observers describe a repeat-visit pattern where crows return to the same productive yards throughout the nesting season.
Weather affects behavior. After heavy rain or cold snaps, ground prey can be scarce and crows shift to higher-value, easier meals. Local fluctuations in insect abundance and human-provided food change raid frequency.
- Observe quietly at a distance to confirm a raid without stressing parents.
- Note shell placement and perch locations to identify the crow's watch sites.
- Install protective measures before eggs are laid when possible.
- If a raid is in progress, do not handle or touch the nest to avoid abandonment.
What to do if crows are raiding your yard
Physical barriers provide reliable protection when installed correctly. Experienced birders often recommend using hardware cloth or netting to shield shrubs and small trees where open-cup nests sit. Place barriers before nests are built and leave a clear access gap so parent birds can enter while crows cannot reach through. This guidance comes from field-tested practices used by nest monitors and conservation groups (see Cornell Lab of Ornithology and local bird club resources).
Cut back things that attract crows. Secure trash, remove pet food left outside, and limit open water where practical. Removing attractants reduces the yard's appeal. Results vary by neighborhood; some people see less crow activity within days, others see smaller changes over weeks. Expect local variation.
Scare devices often fail after a short time. Items such as reflective tape, fake raptors, or inflatable scare figures work until crows learn they pose no threat. Human presence usually disrupts raids longer than static devices. Walking your yard at daylight during nesting season can deter a raid while you are visible, but crows may return when you leave.
Permits and lethal control vary by jurisdiction. Crows are covered by federal and state rules in many places. Some states allow removal or lethal control under depredation permits. Trapping and relocating can be permitted but often fails long-term if new crows move in. Check your state wildlife agency and local regulations before acting beyond nonlethal deterrence.
- Barrier option: use hardware cloth or netting to block access; install before eggs are laid
- Habitat steps: secure trash and remove open food and standing water
- Human activity: visible presence often deters raids temporarily
- Avoid static scare devices as sole protection; crows habituate quickly
Questions people still ask
Will crows kill adult songbirds or just raid nests?
They mainly target eggs and nestlings. Crows rarely kill healthy adult songbirds because adults can escape. Injured or fledgling birds that cannot fly are more vulnerable. This pattern appears in observer reports and is consistent with corvid foraging behavior described by bird care groups.
Can crows open a bluebird box or wren house?
A well-built cavity box with a small entrance hole and depth reduces risk. Most guides recommend entrance holes at or below 1.5 inches for bluebirds. Correct depth and a predator baffle cut crow access in many monitoring programs.
Do crows remember which yards have nests year after year?
Yes. Corvids have strong spatial memory. They often revisit productive patches across seasons. That pattern is well known and reported in both scientific and naturalist literature.
Is it legal to shoot or trap crows that are raiding nests?
Regulations vary. Crows fall under federal and state rules in many places. Some states allow control with permits in cases of depredation. Contact your state wildlife agency before trapping, relocating, or using lethal methods.
What does it mean if a crow killed a cardinal and robins took over the nest?
An empty nest left intact can be reused by another species. Many species will reuse a serviceable nest later in the season. That reuse explains quick changes in nest occupancy you might observe.