Ecological and social cues orchestrate concerted courtship in Drosophila.

In Drosophila erecta, courtship is strictly contingent on ecological and social conditions created when flies densely aggregate on a food patch, enabling coordinated mating.

• Why it matters: Mating depends not only on partner sensory signals but also on environmental context, yet how non-sexual cues reshape group courtship is unclear.
• What they did: The study shows food volatiles promote male sexual arousal, which drives mate sampling and pursuit, while visual motion from group interactions further amplifies arousal via a multisensory feedback loop.
• The result: Comparative circuit analyses indicate species-specific arousal thresholds: food volatiles act as a strict sensory gate in Drosophila erecta but are dispensable for vigorous courtship in Drosophila melanogaster, implying conserved nodes are modulated differently.

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