The females are equipped with conspicuous hooked bristles on the galeae of the proboscis. Microscopical analysis of both pollen contained in the abdominal scopa and sticking to the bodies of females indicates a distinct preference of H. pici for the flowers of Muscari (Liliaceae), which are characterized by having the anthers completely hidden within an urn-shaped corolla. Field observations showed that the specialized bristles serve to scrape pollen out of the Muscari flowers. specialized bristles aiding female bees to extract pollen from narrow flower tubes must have independently evolved at least eight times in osmiine bees. H. pici is the only osmiine species known to use its pollen-harvesting bristles to exploit host plants other than narrow-tubed Boraginaceae.
The presence of pollen grains from Echium (Boraginaceae), Campanula (Campanulaceae), Lotus (Fabaceae), Lactuca (Asteraceae), Brassicaceae and Lamiaceae, suggesting that foraging bees utilise other plants for nectar.