Anopheles crucians is best described as which?

• A. Active during daytime only
• B. Commonly breeds in fast-moving streams
• C. Overwinters only as adults
• D. Active at dusk/night and bites on cool, overcast days

Answer: (D)

Anopheles crucians bites are most likely to occur when people are active outdoors in the evening or indoors at night, and they can continue feeding on cooler, overcast days. This species tends to be active during dusk and night, not during the broad daytime, so a daytime-only description doesn’t fit. The preference for slow or stagnant water is typical for many Anopheles larvae, so a fast-moving stream habitat isn’t correct for this species. Overwintering strategies vary by species and climate, and stating that they overwinter only as adults is too absolute for this mosquito. Taken together, being active at dusk/night and biting on cool, overcast days best matches Anopheles crucians’ behavior.