Agro-biodiversity & Birds of Pusa – Lessons for Sustainable Agriculture

Home » Agro-biodiversity & Birds of Pusa – Lessons for Sustainable Agriculture

A. Issue in Brief

Pusa, Bihar—a historic hub of Indian agricultural research—offers a rare century-scale comparison of bird diversity, linking colonial-era ornithology with present-day agro-ecology.
Comparing C.W. Mason’s early 20th-century records with 2021–22 surveys shows major shifts in avian communities, with implications for natural pest control, crop resilience, and sustainable farming.
The case demonstrates how heritage data + modern digital tools can guide agro-biodiversity conservation and climate-resilient agriculture.

Relevance

GS 1 (Geography & Society)

GS 3 (Agriculture & Environment)

In The Food of Birds in India, C.W. Mason analysed stomach contents of 1,325 birds across 110 species around Pusa to understand crop impacts.
~⅔ of 55,000 recorded food items were insects, including key pests (weevils, grasshoppers, rice hispa), evidencing birds’ role in biological pest regulation.
Functional groups documented: insectivores (drongos, swifts), omnivores (mynas), graminivores (starlings), and predators (shrikes)—forming a natural pest-control web.

Surveys documented ~50 species; only ~30.9% of historically recorded species persist, indicating substantial biodiversity loss.
~69% decline in earlier species (notably scavengers like vultures) linked to habitat loss, toxic veterinary drugs, and landscape change.
Of current species, ~68% are long-term survivors (e.g., Black Drongo, Green Bee-eater, White Wagtail) due to ecological adaptability; ~32% are new colonisers, reflecting community shifts.
Declines in insectivores and raptors weaken natural pest control; crop intensification and climate-driven phenology shifts reduce food availability and alter migration.

Birds are ecosystem service providers: pest control, seed dispersal, and nutrient cycling.
Loss of insectivores can increase pesticide dependence, creating negative feedback loops for biodiversity and soil–water health.
Agro-biodiversity supports climate resilience, buffering farms against pest outbreaks and variability.

Integrating birds into Integrated Pest Management (IPM) can reduce input costs and chemical residues.
On-farm measures—perches, hedgerows, native fruit trees, refuge patches—improve yields via ecological regulation.
Biodiversity-friendly farming aligns with natural/organic farming missions and export-oriented residue standards.

Digitising legacy data and linking with eBird checklists enables long-term biodiversity trend analysis.
AI-based bioacoustics can match bird calls to databases, improving monitoring accuracy and citizen-science participation.
Longitudinal datasets support evidence-based agro-ecological planning.

Aligns with National Biodiversity Action Plan, agro-ecology promotion, and sustainable agriculture policies.
Opportunity to integrate biodiversity metrics into agricultural extension and Krishi Vigyan Kendra advisories.
Landscape-level planning needed to reconcile productivity with conservation.

Ethical stewardship of agro-ecosystems reflects inter-generational responsibility.
Reviving traditional ecological knowledge strengthens community participation in conservation.

Create intentional farm habitats (butterfly gardens, bird refuges, mixed cropping) to restore functional diversity.
Institutionalise long-term ecological monitoring in agricultural research stations.
Promote reduced pesticide regimes and IPM to protect insectivores.
Build living biodiversity databases combining historical and citizen-science data.
Incentivise biodiversity-friendly farming through eco-labelling and market premiums.

Birds provide key ecosystem services in agriculture, especially pest control.
IPM (Integrated Pest Management) emphasises biological and cultural controls over chemicals.
Citizen-science platforms like eBird aid biodiversity monitoring.

“Agro-biodiversity is central to sustainable and climate-resilient agriculture.” Discuss using evidence from long-term ecological observations like those from Pusa, Bihar.