In that I have no serviceberries in my yard yet, I don't know if the fruit is attractive to birds when "green" but it would seem early for the birds to have munched them. The attractive sugars take a while to develop. Although not related, this is true of certain crabapples. Since seviceberries are self-pollinating I would guess an environmental scenerio, like a late frost? Maybe high winds affecting the blossoms? Soil problems that stifle the fruit production as the root system tries to expand?
Could be a number of things.
hortster

I can't tell if they've just been discovered by the birds or there is a problem.

There's really no way to tell unless you know there were berries (lots) on this year or not. And it sounds like you don't know for sure how many berries formed this year.

If berries didn't form at all, but you had plenty of flowers, then yes it would be something like failure to be adequately pollinated or a late frost that killed the fruit.
I am not aware of pollination issues in general with serviceberries (like exists with blueberries and viburnums).

My serviceberry had a bumper crop last year and although a decent flower show this year, the crop was a bit sparse. The birds, squirrels and chipmunks had it cleaned out by June 21.

tj

Thanks for the responses. My neighbors adjacent across the street have 2 cherry trees that are loaded with berries. Whatever affected my trees did not affect theirs.

I will cross my fingers for next year!

I planted a 6 foot Amelanchier x lamarckii 4 years ago, and it has bloomed well each year, had great berries the first 2 years, no fruit the last 2 years. Last year it was extremely dry while flowering, so I thought it was a fluke, but the berries didn't form well this year either. There was quite a bit of fruit starting to form but most of it shriveled up into little brown nubs.

Have no idea why they're doing this, fruit trees are plagued with all kinds of problems in the northeast, but I thought these were supposed to be easier to grow than apples?

New neighbors moved in and have "Pest" company spray like crazy. Maybe that is why the blooms never turned to berries.