Figure 1
From: Electric field detection as floral cue in hoverfly pollination

The electric charge carried by both species and it's transfer to artificially prepared flowers. The histogram of charge carried by flying hoverfly species; measured by the Faraday pail instrument. (a) Cheilosia albipila carried a relatively higher charge than the Eristalis tenax and charge (pC) changes into positive when the flies enter into the Faraday pail and shouts up when it touches the flowers. (b) Indicates the net opposite charge on both species after removing thoracic hairs. It shows that both the species have a net negative charge (pC) on their bodies after removing the hairs.