Far more likely that it's an ornamental cherry tree and fruit will be disappointing in either quantity or flavour. Leave the fruit on for the birds.

Oh dissapointing I thought I could enjoy to eat them the birds will love them then ..thank you ...

Try some when they become ripe.

I didn't know ornamentals set fruit.
If they are edible cherries you can rest assured the blackbirds will know about them before you do! However you only need to taste one as Myron says but let it get properly ripe first.

Some ornamental cherry trees don't set fruit as they are grown only for for their showy flowers.

I'm not aware of any cherries that are poisonous as such, just some are very acidic, some are sweet and some hard. It's a bit like apples... Think of Golden Delicious, Bramleys, then crab apples. All of them are edible, it just depends on how you prefer to eat them... Raw from the tree, cooked or baked in a pie, made into a jam, etc, etc.

I'm sure that if your cherry tree produces fruit, you'll find a way to enjoy them. Wisniowka springs to mind, a Polish Cherry vodka made by steeping cherries and sugar in vodka for a few months. Na zdrowie!

Thank you I'm pleased to here I may be able to eat them ...before the birds ...lol ...that sound nice Myron ??:-) ??