I found this info which I will paste instead of link, because I don't know
that you can link from the list...

Where have all the hummingbirds gone?

What time of year is it? Ruby-throated Hummingbirds occur in the state from
about the second week of March through the second week of November. During
spring migration, especially April and May, you can expect dozens of
individuals at your feeder as they move north across the state. After
spring migration, a smaller number remain to breed. When females begin
breeding they turn to *insects and spiders*, not nectar, to provide the
protein they need to produce and raise young. They also turn to their
preferred natural nectar sources in the form of abundant wildflowers
available in the summer. In July, they finish nesting and once again begin
regularly visiting feeders. In August and September, fall migration brings
an influx of birds from the north. The stream eventually thins out and ends
by November.


On Sun, Jun 8, 2014 at 7:21 PM, Linda D. Thompson <
[log in to unmask]> wrote:

>  I still have some but the activity has decreased. I've had this happen
> every year and I also assumed that they were on nests and therefore not as
> active. Not sure if my theory is correct.
>
> Sent from my iPad
>
> On Jun 8, 2014, at 5:30 PM, "Connie Snyder" <[log in to unmask]>
> wrote:
>
>   ​Thanks to everyone who has offered theories to my query
> regarding disappeared hummingbirds.  This list is so helpful and
> heart-warming for amateurs like me.
>
>  However, today, while visiting a farm on Tucker Hill Road in Thetford, I
> learned that they had half-a-dozen hummers zooming around their
> feeder until about a week ago.  Now, there are none there either.
>
>  I have never had this happen before, nor had she.  Troubling...
>
>  Hope there is not a disease going around.
>
>  Connie Snyder
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