Wasps & Lychee..good/bad?

[Jani]

Noticed some wasps made a nest on some leaf undersides of my sweetheart tree. I've seen them do that before over the years but this is the first time this tree is flowering. My first thought is to leave them there as they've been working the flowers, and also because they are not aggressive at all, and it seems quite convenient for the tree to have its very own hive while it flowers. But question, some wasps are predatory/parasitic correct? Do these guys have any negative impact on other beneficial pollinators? I haven't really seen any other insects hanging around the flowers besides these wasps... thoughts?

pics below of the nest and a wasp working the flowers:

[From the sea]

As long as they don't bother you I say leave them more good than bad.

[HMHausman]

Hard to see which wasps those are....but they look like the standard orange-ish colored, what I call, paper wasps.  They are generally benign and beneficial.  They will chew on wood to get the pulp to make their nests and they sting like nobody's business if you disturb them.  However they are not aggressive. The question about leaving them is dependent upon whether you or a loved one intends to get up into the branch where they are located at harvest or anytime before.

[Jani]

I'll try to get a closeup pic..but yeah that sounds like the type. There's one emerging panicle above their location but that's one many, so probably more benefit to have them stay.

[fruitlovers]

I think most of the wasps that are predatory on insects are quite small and don't sting humans.