AlexPalex

Thanks! Given that the solution implied in both of these answers is just "wait a couple days", I'll probably never know which one of the two is the actual cause, so I don't know which one to mark as the solution. Thanks again regardless!

I've placed the skep two blocks below and one block adjacent to a wild bee hive with 41 nearby flowers and a large population size, left it there for two days, and nothing has happened. Why? Is the temperature an issue? It's getting down to -2 at night.