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September 5, 2025Open Access

Ambient temperature, clutch size, and daylight are the main drivers of incubation behavior in two neotropical swallows breeding 8,000 km apart

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Authors

DDDavid Diez‐MéndezMLMarcela LiljeströmCCCaren B. Cooper

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Overview

Observational analysis reveals clutch size and ambient temperature influence incubation strategies in swallows, suggesting adaptations to local conditions.

Key Points

  • Both swallow species maintained ~75% nest attendance, adapting their incubation patterns to local conditions.
  • Tachycineta swallows showed different strategies; longer incubation bouts in mangrove swallows were compensated by nocturnal activity.
  • Larger clutches affected Chilean swallows more, shortening incubation bouts while increasing foraging time.
  • The study indicates females reduced incubation effort during improved weather, challenging earlier paradigms around incubation behaviour.

Cite This Study

Diez‐Méndez et al. (2025) studied this question.

synapsesocial.com/papers/68bb4d276d6d5674bcd013b4https://doi.org/10.1101/2025.08.27.672727
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