Flower visiting behaviour of Celonites fischeri at Echium angustifolium: 6 Female entering flower head first for nectar uptake 7 Female leaving flower after nectar uptake with proboscis still protruding 8 Male deeply inside corolla tube during nectar uptake 9 Male feeding on pollen directly from an anther 10–11 Female taking up pollen from flower with only slightly opened corolla tube 10 from anther accessible from outside 11 after forcing her head into the corolla tube from anthers inside the corolla tube 12–13 Females taking up pollen from the same flower at different stages of corolla opening 12 corolla half open 13 9.5 min later corolla completely open.