I don't know what this is

I don't know what this is

Observation - I don't know what this is. Description: If anyone can tell me what this is that'd be great. I spotted hundreds of them crawling up my pine tree yesterday. Some of them were feeding on the sap.

If anyone can tell me what this is that'd be great.
I spotted hundreds of them crawling up my pine tree yesterday. Some of them were feeding on the sap.