Which organism is known to feed only on plant nectar and juices?

The organism known to feed only on plant nectar and juices is Toxorhynchites. This genus of mosquito is unique among mosquitoes because it does not consume blood; instead, its diet consists exclusively of nectar and other plant-based fluids. This feeding behavior makes Toxorhynchites ecologically significant as it plays a role in pollination and serves as a source of food for other organisms without impacting animal populations through blood feeding.

In contrast, the other organisms mentioned, such as Aedes albopictus, typically feed on blood for their nutritional needs, particularly when females are developing eggs. Similarly, Culicoides sonorensis is known for its biting habits as well, often feeding on the blood of mammals and thus having a different feeding strategy. Manuscriptus columbiae is less widely recognized, but it would also not be categorized as a strict nectar feeder. This distinction highlights the unique ecological niche occupied by Toxorhynchites and underscores its importance in environments where pollination and nectar feeding are essential for ecosystem health.