unidentified black insect eggs/cases

unidentified black insect eggs/cases

Observation - unidentified black insect eggs/cases . Description: These shiny, black, slightly oblong items are not much bigger than elderberries. They are clustered around the nail head on which a ceramic decorative birdhouse is sitting. The tree the birdhouse is attached to is a cherry. Apologies for the lack of pict

These shiny, black, slightly oblong items are not much bigger than elderberries. They are clustered around the nail head on which a ceramic decorative birdhouse is sitting. The tree the birdhouse is attached to is a cherry.
Apologies for the lack of picture quality - I am short, the birdhouse is high.