Amendment XC — eBird Independent Replication of Phi_migration Framework

# Amendment XC — eBird Independent Replication of Phi_migration Framework ## Cross-Dataset Validation: 515,764 Checklists, Great Plains Corridor, 2019-2023 **McCaul's Law of Coherence — Compendium of Coherence** **Version:** 1.0 — First Publication **Date:** May 19, 2026 **Author:** Justin McCaul, Independent Researcher, Wilburton, Oklahoma **Master Compendium DOI:** 10.5281/zenodo.20100469 **Prior validation (Amendment LXXXVI):** 10.5281/zenodo.20279010 --- ## 1. Motivation Amendments LXXXV–LXXXIX established the Phi_migration framework using iNaturalist citizen science records (Amendment LXXXVI: z=6.73, p<0.0001, Cohen h=0.838 for birds; Amendment LXXXIX: z=5.59, p<0.0001, Cohen h=1.591 for caribou). These results are statistically robust, but a single data source carries inherent limitations — iNaturalist records are opportunistic, biased toward weekends and accessible locations, and represent a relatively modern platform (post-2012 for meaningful volume). Amendment XC provides an **independent replication** using Cornell Lab of Ornithology's **eBird** dataset — the world's largest biodiversity database for birds, with over 100 million observations contributed b

Amendment XC (90) of McCaul's Law of Coherence compendium. Author: Justin McCaul. ORCID: 0009-0009-4508-642X. Canonical compendium DOI: 10.5281/zenodo.20100469.