There are bumbles in the tropics, here's an Amazonian species
> The Amazonian bumble bee, Bombus transversalis, is mostly restricted to tropical rain forest of the Amazon Basin. Little is known of its biology, in part because its surface nests are cryptic and hard to find. — Taylor, O. M., & Cameron, S. A. (2003). Nest construction and architecture of the Amazonian bumble bee (Hymenoptera: Apidae). Apidologie, 34(4), 321-331.
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