They look like aphid moltings.

I would say bird damage; small birds often take the oil from leaves/fruit to apply to their feathers as mite repellent.

Can't see any damage from birds or anything else.

But, yes, there are live aphids and either dead ones or, as Tom says, the exoskeletons (skins) of aphids which are discarded as they grow.

Warm winter temps = more bug problems!

So far our indoor winter temps have been bouncing between 60F and 65F With the highs naturally occurring during the sunlight hours. LOL

Steve