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We investigate movement patterns of two sympatric raven species, fan-tailed raven (Corvus rhipidurus) and brown-necked raven (C. ruficollis), in the Judean Desert and Dead Sea coastline of Israel. Using GPS tracking data from 64 ravens (43 fan-tailed, 21 brown-necked) collected between 2022 and 2024, we analyse movement metrics across four temporal scales (20, 60 minutes, 1 and 10 days). The total distance travelled by the brown-necked ravens was larger during 10 days, but, as expected, similar during the short time scales. Fan-tailed ravens, inhabiting areas with increased human activity, flew along more linear trajectories with higher straightness, particularly at longer temporal scales. These findings suggest that while both species cover similar distances, fan-tailed ravens mostly commute efficiently between resource patches in their human-modified habitat, whereas brown-necked ravens cover a much larger area, mostly away from anthropogenic hotspots. Our results highlight the importance of examining movement patterns across multiple temporal scales to detect species-specific behavioural adaptations to environmental changes. This study contributes to our understanding of how closely related species with different population trends may respond to rapid landscape alterations through adjustments in their movement patterns.

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Classification of Similarities and Differences in Movement Between Two Sympatric Raven Species Across Multiple Spatiotemporal Scales

  • 章节

  • 发表日期：

    2026年

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  • Bar Ashkenazi,
  • Miguel de Guinea,
  • Rachel Zuckerman,
  • Ran Nathan,
  • Michael Assaf

摘要

We investigate movement patterns of two sympatric raven species, fan-tailed raven (Corvus rhipidurus) and brown-necked raven (C. ruficollis), in the Judean Desert and Dead Sea coastline of Israel. Using GPS tracking data from 64 ravens (43 fan-tailed, 21 brown-necked) collected between 2022 and 2024, we analyse movement metrics across four temporal scales (20, 60 minutes, 1 and 10 days). The total distance travelled by the brown-necked ravens was larger during 10 days, but, as expected, similar during the short time scales. Fan-tailed ravens, inhabiting areas with increased human activity, flew along more linear trajectories with higher straightness, particularly at longer temporal scales. These findings suggest that while both species cover similar distances, fan-tailed ravens mostly commute efficiently between resource patches in their human-modified habitat, whereas brown-necked ravens cover a much larger area, mostly away from anthropogenic hotspots. Our results highlight the importance of examining movement patterns across multiple temporal scales to detect species-specific behavioural adaptations to environmental changes. This study contributes to our understanding of how closely related species with different population trends may respond to rapid landscape alterations through adjustments in their movement patterns.