fluid feeder

https://doi.org/10.1351/goldbook.14697
Organism that feeds on the fluids of other animals or of plants.
Examples: Aphids, ticks, mosquitoes, leeches, and hummingbirds.
Source:
PAC, 2009, 81, 829. (Glossary of terms used in ecotoxicology (IUPAC Recommendations 2009)) on page 888 [Terms] [Paper]