A month ago, I found that my neglected hive had built its own propolis entrance reducer since I forgot to add one last fall. As temperatures warm up with the season, my theory is that the girls will remove and reshape the propolis as needed. Here are two shots, about one month apart and one month closer to summer. Do you notice any changes?
Propolis at the hive entrance on March 2
Propolis at the hive entrance on April 9
mistress beek 
That’s too cool!