Psorophora columbiae is described as which?

• A. Overwinters as adults; breeds in small ponds
• B. Breeds in rice fields and temporary pools; rapid 4-5 day life cycle
• C. Not a vector for any viruses
• D. Low flying and rarely travels far

Answer: (B)

Floodwater habitat and rapid development define this species. Psorophora columbiae exploits temporary flooded habitats such as rice fields and other pools that form after rainfall or irrigation. In warm weather, its life cycle from egg to adult can be as short as about 4–5 days, so populations can surge quickly when water is present. This combination of breeding in rice fields and temporary pools with a very fast development cycle is the best description. It does not overwinter as adults and eggs typically survive dry periods to hatch when flooding returns. It’s not accurate to describe it as low-flying, since floodwater mosquitoes can disperse and travel. While some mosquitoes can be disease vectors, the defining feature here is its habitat and rapid life cycle, which matches the statement about rice fields, temporary pools, and a 4–5 day development time.