Evidence of nest abandonment in Grass Wrens Cistothorus platensis suggest that non-breeding nests are not structures that differ in function from breeding nest

Llambías, Paulo E.; Jefferies, María Milagros; Zarco, Agustín; Garrido, Paula S.; Arrieta, Ramiro S.

doi:10.1007/s10336-022-01992-3

Cited by 2 publications

(4 citation statements)

References 52 publications

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“…Accordingly, Grass Wrens at our study site orient their nests towards the NNE, maximizing sun exposure during the morning (Llambías et al . 2022). Indeed, solar radiation has a key influence on nest placement and hatching success for the Tree Pipit Anthus trivialis (Burton 2006).…”

Section: Discussionmentioning

confidence: 99%

“…Nests are oriented towards the NNE, presumably to increase the sun exposure during the morning (Llambías et al . 2022). The most frequent clutch size is four to five eggs, which are incubated for 14–18 days (Llambías et al .…”

Section: Methodsmentioning

confidence: 99%

“…Several bird species select nest-sites so that the nests are exposed to solar radiation during the cold morning hours but are shaded from intense insolation in the afternoon (Nelson & Martin 1999, Hoekman et al 2002. Accordingly, Grass Wrens at our study site orient their nests towards the NNE, maximizing sun exposure during the morning (Llambías et al 2022). Indeed, solar radiation has a key influence on nest placement and hatching success for the Tree Pipit Anthus trivialis (Burton 2006).…”

Section: Nest Size and Nest Placementmentioning

confidence: 99%

“…At our study site, nests are built close to the ground (c. 75 cm) and almost exclusively in Pampas Grass Cortaderia selloana; a large perennial Poaceae that grows as singular clumps that can exceed 2 m in diameter and 3 m in height. Nests are oriented towards the NNE, presumably to increase the sun exposure during the morning (Llambías et al 2022). The most frequent clutch size is four to five eggs, which are incubated for 14-18 days (Llambías et al 2018).…”

Section: Study Speciesmentioning

confidence: 99%

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Female Grass Wrens adjust brooding effort according to ambient temperature, male feeding contribution and nest placement

Jefferies

Mendoza

Llambías

2022

Ibis

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The keystone of life‐history evolution theory proposes a trade‐off between current reproductive effort and future survival. Brooding is an essential and often overlooked component of parental behaviour of altricial birds intended to transfer heat to nestlings. Brooding under challenging environmental conditions can be energetically demanding and may adversely affect adult survival and future reproduction. We provide the first detailed description of the brooding behaviour of a south temperate grassland specialist: the Grass Wren Cistothorus platensis. In Grass Wrens, both sexes collaborate in parental care; however, only females brood the nestlings. We examined the relationship of ambient temperature, male feeding contribution, nestling age, nest size and nest placement in determining brooding behaviour. Additionally, we evaluated the effects of brooding behaviour on nestling body condition near fledging and female apparent survival. Brooding effort decreased with nestling age. Females increased their brooding effort at low ambient temperature and when males delivered more food. At lower ambient temperatures, females increased brooding effort in nests placed further from plant edge, with taller plant heights and well‐concealed substrates. However, there was no relationship between brooding effort and nest size. Neither female investment in brooding nor the number of nestlings produced per female was associated with nestling body condition near fledging or female annual apparent survival. Our results identify several factors that shape brooding behaviour in this south temperate passerine, suggesting that females favour nestling thermal conditions under adverse weather conditions.

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Section: Discussionmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%