Here's the thing, as far as I know, there are no fledgling robins at this
time of year. Was the robin you saw large with a yellow beak and red breast
etc.? If it was, then it may have just been an injured (seriously injured)
adult or sick one. It's rare that crows will attack adult birds just because
they are easily fit to outfly a crow. Now recently fledged young are a
different story. I've seen many times crows make dives upon fledgling
starlings (yes) and try to catch them. They'll do the same for any bird if
they can. Just last couple of days, a crow found a robin's nest and raided
it twice before I went to school. My female tree swallow mobbed it a couple
of times, she wasn't too serious. Crows can be a threat, if they don't have
other food to occupy their attention, they'll search and sometimes that
means for nests to raid. A couple of months ago a crow flew/chased after a
robin and the robin easily out flew it and maneuvered it. Then the robin
made a few quick goes nipping the crow because it was too near the nest. So
you see, usually the crow goes after very sick and injured birds unlike an
accipiter or falcon which doesn't need a bird to be so sick/injured it can't
do much because obviously they're equiped to dealing with fast and agile
prey. I would just keep an eye on them.


Blake Iverson

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