Beevilweevils are large insects, featured in the Adventures of the Gummi Bears episode "Day of the Beevilweevils".
Background[ ]
When Tummi Gummi builds a honey bee caller in an attempt to attract more of the insects to pollinate more Gummiberry bushes, he ignores very specific instructions given in the Great Book of Gummi. Despite Zummi Gummi's warning that Tummi acted carelessly in constructing the device, using the wrong wood, drilling too few holes, on the wrong side, and using a rope that is too long, he goes on using it anyway.
Zummi's warning holds true, and instead of honey bees, Tummi attracts the voracious Beevilweevils. Nothing that the Gummies attempt to stop the greedy bugs is successful, and all that ends up being left of the Gummiberry bushes are bare branches (and unbeknownst to them, some still-fertile roots).
The bears eventually travel to the deserted Gummi colony of South Gumton in order to find a sapling to replace the bushes.