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Nest characteristics, egg attributes, and hatching success of river lapwing, Vanellus duvaucelii

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Abstract

We studied the nest characteristics, egg attributes, and hatching success of globally “Near-threatened” river lapwing, Vanellus duvaucelii, in four habitat types in northern India during four consecutive breeding seasons (2016‒2019). Out of a total of 300 nests, most of them were found in medium-sized colonies (3‒4 nests), openly on sandy ground with shallow scrape (70%, n = 210) and others were lined with wood twigs and dry stems (30%, n = 90). The mean clutch size was 3.37 ± 0.86, although there was no significant difference in mean clutch size and egg size in different years and habitat types. Moreover, there was slight difference in clutch size and egg volume during the breeding season. The median incubation period was 28 days. Hatching was synchronous and completed one after the other within 24 h. Hatching success varied in different years and habitat types. Hatching success was high in 2018 at open unvegetated river bank compared to other habitats and years, as egg laying period and probability of egg survival were high. Moreover, hatching success rate significantly varied across the habitats and years. Results of generalized linear model analysis revealed that factors that affect daily predation rate were most closely related to habitat of nesting, distance to river bank, nearest nest location, and egg laying date. Egg failure occurred predominantly due to predation and farming activities. Furthermore, trampling, human disturbance, and egg non-viability were other factors responsible for egg loss.

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Acknowledgements

The authors would like to express their gratefulness to the Head, Department of Zoology, University of Lucknow, for providing facilities and administrative support. Vikas Kumar is thankful to the Council of Scientific and Industrial Research (CSIR), New Delhi, for Senior Research Fellowship [Ref. No. 21/06/2015(i) EU-V]. The authors are also thankful to Mr. Rishi Shakya, an undergraduate student who actively helped during the fieldwork, and to the local people of the study area who have given the secondary information about the nesting sites.

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Vikas Kumar (conceptualization, performed field survey, data collection, statistical analysis, and writing), Himanshu Mishra (performed field survey, data collection, and interpretation), Prateek (data collection and interpretation), Ashish Kumar (conceptualization, interpretation, and planning research).

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Correspondence to Ashish Kumar.

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The authors declare no competing interests.

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Communicated by: Cristiano Azevedo

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Kumar, V., Mishra, H., Prateek et al. Nest characteristics, egg attributes, and hatching success of river lapwing, Vanellus duvaucelii. Ornithol. Res. 30, 118–129 (2022). https://doi.org/10.1007/s43388-022-00089-y

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  • DOI: https://doi.org/10.1007/s43388-022-00089-y

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