Interesting observation about crows and juv robins. This is consistent with
research on that topic. I discuss some of it here.
The maddening truth: Feeding crows and jays harms other birds
https://thecottonwoodpost.net/2022/05/02/the-maddening-truth-feeding-crows-and-jays-harms-other-birds/
Here's an excerpt:
Malpass et al (2017) conducted an experiment in seven neighborhoods in
Ohio, adding bird feeders during the breeding season to some areas. The
neighborhoods with the most feeders had triple the numbers of American
Crows and Brown-headed Cowbirds compared to the neighborhoods with the
least feeders. American Robin nest success fell to just 1% in the
high-feeder neighborhoods, compared to 34% in the areas with the fewest
feeders.
On Sat, Jul 23, 2022 at 3:51 PM Dayna yalowicki <
dlwicki at comcast.net> wrote:
>
You're lucky to have baby robins, we have watched crows take them right as
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they fledge or are about to fledge every year for at least 10 years. The
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parents keep building nests under our deck and I swear the same crows come
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back each year and wait. I can see the crows behavior change as the babies
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get close to leaving the nest, they start walking the yard, singly but
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working together, 3 or 4 of them. One year, I had had enough and I was so
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upset about this that I sat close with a pellet gun, prepared to take out
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any crow that threatened the fledglings as they were staggering around
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underneath the nest. In the end, I couldn't do it. Instead, I began chasing
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them away but they were fierce! One crow actually charged me and wouldn't
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back down. While I dealt with this, another crow flew off with a baby and
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then another. Made me sick to see it and I had been defeated. So, these
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days, I ignore any nests. What will be will be and ignorance is bliss.
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>
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--
Steve Hampton
Port Townsend, WA (qatáy)