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<p>Nest predation is one of the main causes of reproductive failure in birds, and snakes are frequent predators of avian nests in many ecosystems. Here, we report a nest predation event on the pearly-vented tody-tyrant (<i>Hemitriccus margaritaceiventer</i>) by the Lichtenstein’s green racer (<i>Philodryas olfersii</i>) in northeastern Argentina. The snake accessed the pendulous nest by perforating the posterior wall and captured a nestling close to fledging age. The predation event lasted 1&#xa0;h 25&#xa0;min and triggered intense mobbing behaviour by the nesting pair, followed by the participation of at least five additional bird species (<i>Saltator similis</i>, <i>Tyrannus melancholicus</i>, <i>Thamnophilus caerulescens</i>, <i>Saltator coerulescens</i>, and <i>Myiophobus fasciatus</i>). This observation documents active nest-wall perforation by an arboreal snake and a multi-species mobbing response during an extended predation event, providing novel behavioural information on snake–bird interactions and the diet of Lichtenstein’s green racer in subtropical ecosystems.</p>

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Nest predation of a pendulous pearly-vented tody-tyrant (Hemitriccus margaritaceiventer) by the Lichtenstein’s green racer (Philodryas olfersii) in northeastern Argentina

  • 期刊论文

  • 发表日期：

    2026年7月27日

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  • Jonas Rafael R. Rosoni,
  • Juan Francisco Cataudela,
  • Simón Kraemer,
  • Cecilia Kopuchian,
  • Adrián S. Di Giacomo

摘要

Nest predation is one of the main causes of reproductive failure in birds, and snakes are frequent predators of avian nests in many ecosystems. Here, we report a nest predation event on the pearly-vented tody-tyrant (Hemitriccus margaritaceiventer) by the Lichtenstein’s green racer (Philodryas olfersii) in northeastern Argentina. The snake accessed the pendulous nest by perforating the posterior wall and captured a nestling close to fledging age. The predation event lasted 1 h 25 min and triggered intense mobbing behaviour by the nesting pair, followed by the participation of at least five additional bird species (Saltator similis, Tyrannus melancholicus, Thamnophilus caerulescens, Saltator coerulescens, and Myiophobus fasciatus). This observation documents active nest-wall perforation by an arboreal snake and a multi-species mobbing response during an extended predation event, providing novel behavioural information on snake–bird interactions and the diet of Lichtenstein’s green racer in subtropical ecosystems.