Can an insectivore only eat Black Solider Fly larvae and survive?

[FrostyWind]

Hi Good Day
I'd like to know if Insectivores could eat only Black Solider flies or they need a variety of different insects too?
Like birds that only eat insects like a Wren? Can they survive from only eating black Solider fly larvae?
Thank You

 

[Cyprus]

Survive, maybe. Thrive, probably not.
Even insectivors still have a varied diet. BSF do not compose a nutritionally complete diet.