State of India's Birds 2023: A framework to leverage semi-structured citizen science for bird conservation. Viswanathan, A., Thrikkadeeri, K., Koulgi, P., Praveen, J., Deomurari, A., Jha, A., Warudkar, A., Suryawanshi, K., Madhusudan, M. D., Kaushik, M., Goyal, N., Jayapal, R., Quader, S., Dutta, S., Menon, T., & Ramachandran, V. Ecosphere, 16(7):e70290, July, 2025.
State of India's Birds 2023: A framework to leverage semi-structured citizen science for bird conservation [link]Paper  doi  abstract   bibtex   
Birds and their habitats are threatened with extinction around the world. Regional assessments of the “State of Birds” are a vital means to prioritize data-driven conservation action by informing national and global policy. Such evaluations have traditionally relied on data derived from extensive, long-term, standardized surveys that require significant resources, limiting their feasibility to a few regions in the world. In the absence of such “structured” long-term datasets, “semi-structured” datasets have recently emerged as a promising alternative in other regions around the world. Semi-structured data are generated and uploaded by birdwatchers to citizen science platforms such as eBird. Such data contain inherent biases because birdwatchers are not required to adhere to a fixed protocol. An evaluation of the status of birds from semi-structured data is therefore a difficult task that requires careful curation of data and the use of robust statistical methods to reduce errors and biases. In this article, we present a methodology that was developed for this purpose and was applied to produce the comprehensive State of India's Birds (SoIB) 2023 report. SoIB 2023 assessed the status of 942 bird species in India by evaluating each species based on three metrics: (1) long-term change, (2) current annual trend, and (3) distribution range size. We found evidence that 204 species have declined in the long term and that 142 species are in current decline. Birds that have vertebrate or invertebrate diets have declined most rapidly in the long term, whereas those that feed on fruits and nectar have been stable. Birds that require grasslands have declined more rapidly than those that require other habitats, indicating that grasslands are an important ecosystem to prioritize conservation in India. We classify 178 species as high conservation priority and present and discuss important insights about India's birds that can guide research and conservation action in the region. We hope that the detailed methodology described here can act as a blueprint to produce State of Birds assessments from semi-structured citizen science datasets and springboard conservation action in many other regions where structured data are lacking but strong communities of birdwatchers exist.
@article{viswanathan_state_2025,
	title = {State of {India}'s {Birds} 2023: {A} framework to leverage semi-structured citizen science for bird conservation},
	volume = {16},
	copyright = {All rights reserved},
	issn = {2150-8925},
	shorttitle = {State of {India}'s {Birds} 2023},
	url = {https://onlinelibrary.wiley.com/doi/abs/10.1002/ecs2.70290},
	doi = {10.1002/ecs2.70290},
	abstract = {Birds and their habitats are threatened with extinction around the world. Regional assessments of the “State of Birds” are a vital means to prioritize data-driven conservation action by informing national and global policy. Such evaluations have traditionally relied on data derived from extensive, long-term, standardized surveys that require significant resources, limiting their feasibility to a few regions in the world. In the absence of such “structured” long-term datasets, “semi-structured” datasets have recently emerged as a promising alternative in other regions around the world. Semi-structured data are generated and uploaded by birdwatchers to citizen science platforms such as eBird. Such data contain inherent biases because birdwatchers are not required to adhere to a fixed protocol. An evaluation of the status of birds from semi-structured data is therefore a difficult task that requires careful curation of data and the use of robust statistical methods to reduce errors and biases. In this article, we present a methodology that was developed for this purpose and was applied to produce the comprehensive State of India's Birds (SoIB) 2023 report. SoIB 2023 assessed the status of 942 bird species in India by evaluating each species based on three metrics: (1) long-term change, (2) current annual trend, and (3) distribution range size. We found evidence that 204 species have declined in the long term and that 142 species are in current decline. Birds that have vertebrate or invertebrate diets have declined most rapidly in the long term, whereas those that feed on fruits and nectar have been stable. Birds that require grasslands have declined more rapidly than those that require other habitats, indicating that grasslands are an important ecosystem to prioritize conservation in India. We classify 178 species as high conservation priority and present and discuss important insights about India's birds that can guide research and conservation action in the region. We hope that the detailed methodology described here can act as a blueprint to produce State of Birds assessments from semi-structured citizen science datasets and springboard conservation action in many other regions where structured data are lacking but strong communities of birdwatchers exist.},
	language = {en},
	number = {7},
	urldate = {2025-07-18},
	journal = {Ecosphere},
	author = {Viswanathan, Ashwin and Thrikkadeeri, Karthik and Koulgi, Pradeep and Praveen, J. and Deomurari, Arpit and Jha, Ashish and Warudkar, Ashwin and Suryawanshi, Kulbhushansingh and Madhusudan, M. D. and Kaushik, Monica and Goyal, Naman and Jayapal, Rajah and Quader, Suhel and Dutta, Sutirtha and Menon, Tarun and Ramachandran, Vivek},
	month = jul,
	year = {2025},
	pages = {e70290},
}
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