Every female digger bee lays small numbers of eggs in a single nest ... but some with markings of white, yellow, or reddish brown). Females are larger than males with thick hairs on the hindlegs ...

Endemic yellow-faced bees rely mostly on native plants for food ... such as the highly endangered Hylaeus anthracinus, are limited to small populations along the coastline.

As they collected pollen to eat, these bees pollinated everything from silverswords to naupaka. Today, the Hawaiian yellow-faced bee populations are in decline and likely to become endangered ...