Saffron-cowled Blackbirds' reduced nest success in Argentina's agricultural land highlights the importance of non-agricultural habitat for its conservation

The Saffron-cowled Blackbird (Xanthopsar flavus) is a globally endangered icterid endemic to the southern South American grasslands. Temperate grasslands are among the most threatened ecosystems in South America due to their high rate of land use change. In northeastern Argentina, over the last century, the conversion of natural grasslands to livestock farming, croplands, and afforestation have resulted in significant losses of breeding habitat for the Saffron-cowled Blackbird. Consequently, it has suffered severe populational declines, and its remaining populations are fragmented. In order to understand the impact of agricultural systems on the Saffron-cowled Blackbird populations, we studied its breeding biology (clutch size, hatching success, nestling production, and fledgling success) and the main parameters that influence nest survival rate in five breeding habitat types. During the breeding seasons of 2015 to 2019 we located nests and monitored their fate. We found that the cumula..., GENERAL INFORMATION
 
1. Dataset used for the article: Saffron-cowled Blackbirds' reduced nest success in Argentina's agricultural land highlights the importance of non-agricultural habitat for its conservation.
 
2. Study published in Ornithological Applications by Pucheta, M.F; Pereda, M.I, and Di Giacomo, A.S.
   Corresponding author email: [e-mail]
   Correspondig author institution: Centro de Ecología Aplicada del Litoral, CONICET.
 
3. Date of data collection: 2015-2019
 
4. Geographic location of data collection: Argentina (Entre Ríos and Corrientes provinces). 
 
For specific data collection methods please reefer to method section of the manscript in the DOI: 10.1093/ornithapp/duae006. Journal: The Condor: Ornithological Applications
 
5. Information about funding sources that supported the collection of the data: PICT2014–3397, PICT2014–2057, PIP2022-2024, Neotropical Bird Club, Neotropical Grassland Conservancy, The Rufford Fundation, Young Conservation Leadership ..., , # Saffron-cowled Blackbirds' reduced nest success in Argentina's agricultural land highlights the importance of non-agricultural habitat for its conservation

In order to understand the impact of agricultural systems over the endangered Saffron-cowled Blackbird populations, we studied its breeding biology (clutch size, hatching success, nestling production, and fledgling success) and the main parameters that influence nest survival rate in five breeding habitat types. During the breeding seasons of 2015 to 2019 we located nests and monitored their fate (please refer to methods section in the manuscript for detailed methodology).

We provide the data set in Excel spreadsheet format, with the data used in each analysis, each in a separate Excel file for clarity. In addition, we include a single text document that contains the scripts used for each analysis in the R R. Each graphic analysis is separately with its respective title.Description of the data and file structure.

GENERAL INFOR...