The branches now look like this second picture, indicating the bees are either heavy enough to bend the branches, or break them.
I was going to use WolframAlpha to do a quick calculation – but apparently Wolfram does not know what a whole honey bee weighs. It does know that wing weight | 0.0024 oz (ounces). Unfortunately that doesn’t help me right now. Either way – a bunch of bees is pretty heavy. I’ll see if I can get a more accurate answer. Feel free to leave your ideas/guesses/formulas or answers as a comment!