I hope they're friendly wasps

One of my Rosa glauca roses was host to some rose-gall wasps this past Summer.  The wasps have an affinity for certain species roses, like Rosa glauca.  Their offspring develop in the galls and emerge the following Spring.  I'll wait to see what happens.  Here's how the gall looked on August 29th:

And here's how the gall looked today, December 12th: