American crows caw year-round in our neighborhood. I’ve been trying to distinguish one call from another. One that’s easy to identify is the begging call made by juveniles.
I started hearing the youngsters in May. Some were still in the nest and are clamoring for food. Some were on the ground but couldn’t fly yet and called on the adults for help.
The begging call sounds more like a “wah” than a “caw.” If you don’t know it, there are links to recordings below.
Some of the fledglings will go off on their own, while others will stick around and help their parents. Biologists talk about “helpers,” adult birds that help the breeding pair.
Crows eat just about anything, and there’s a lot of calling among the adults. When someone discovers a bonanza, everyone in the family is called in, while members of other families are warned off.
Research suggests some gender roles among the helpers. Females tend to act as sentinels, allowing the other adults to forage. Males tend to act as enforcers, driving off crows from other families and joining in mobbing predators.
One call is unmistakable: the scream.
On a trip to Walker’s Pond, we saw six crows mobbing a red-tailed hawk. I think the hawk had discovered a young crow on the ground and had hoped for lunch. It left disappointed.
• Sources: Recordings of juvenile crows begging are here:
https://www.google.com/search?client=safari&hs=MtVV&sca_esv=05ee508a17931f71&hl=en-us&q=Begging+call+juvenile+crow+youtube&sa=X&ved=2ahUKEwiY_ICkqLKVAxWP4ckDHb7gDzQQ1QJ6BAhXEAE&biw=312&bih=516&dpr=3#fpstate=ive&vld=cid:1f9f8c5a,vid:JtrVloeFzFQ,st:0
and here:
https://youtu.be/OnBD9As92fE?is=gvj6sroDK0m29nRQ
Dr. Robin Tarter’s master’s thesis, “The Vocal Behavior of the American Crow, Corvus Brachyrhynchos”; The Ohio State University, 2008, is available here:
https://etd.ohiolink.edu/acprod/odb_etd/ws/send_file/send?accession=osu1204876597&disposition=inline