Top Results for Scarce
Osmia xanthomelana is a solitary species of mason bee native to Europe, first scientifically described by William Kirby in 1802. Unlike many bees that nest in pre-existing cavities or underground, this species is notable for constructing free-standing, exposed nest cells attached to rocks or stones....
Why this score
Remarkable exposed nest construction using chewed leaves and minerals, combined with conservation concern, drives strong natural-history appeal.
Scoring methodology
Bombus tristis is a historical scientific name that is treated as a synonym of Bombus humilis, the Brown-banded Carder Bee, rather than as a separate South American species. The accepted species is a bumblebee in the family Apidae and a member of the genus Bombus, with a Palearctic distribution exte...
Why this score
Temperate forest specialization offers ecological interest, but scarce public visibility and limited distinguishing reputation produce only moderate consensus.
Scoring methodology
