The blue-bearded helmetcrest (Oxypogon cyanolaemus) is a Critically Endangered species of hummingbird in the "coquettes", tribe Lesbiini of subfamily Lesbiinae.

The rest of the underparts are dingy buff with olive spots that blends to buffy white on the undertail coverts.

[6] The blue-bearded helmetcrest is found only in the isolated Sierra Nevada de Santa Marta of northern Colombia.

As of February 2022, Xeno-canto had two recordings of blue-bearded helmetcrest vocalizations and Cornell University's Macaulay Library had 13.

In March 2015, the blue-bearded helmetcrest was rediscovered by researchers from the foundation ProAves while documenting fires set by local farmers.

Though the species' entire range is nominally protected in Sierra Nevada de Santa Marta National Park, Indigenous people regularly burn the páramo to produce cattle pasture and collect Libanothamnus occultus for firewood.