> I don't know if there is experimental data, but my
> hummers at Tahoe and Tucson appear to have a learning
> curve and a memory. That means that once they know
> the feeders are there, I'm one of the first places
> that get checked when they return the next year. I'm
> also one of the last spots to see the last migrants.
> The result looks like they come earlier and earlier,
> but I think that they're just smarter than we think.
>
> RCC

I've been feeding the hummers here for about 7 years, so the first pass
broadening effect should have been over before I started collecting
measurements.

As far as them remembering where the feeders are, someone told me that a
place where she used to have a feeder hung was still visited and checked out
5 years later.

Dave Nuttall
Oak Bay, WA
djhn42-tweet at yahoo.com