Avian Bander Companion

Avian Bander's Companion is the essential field tool for licensed North American bird banders — built by a researcher with 500+ birds banded across the Appalachian chickadee hybrid zone. BANDING DATA ENTRY Complete BBL-standard data form: species, band number, band size, age code, sex, measurements, fat score (0–7), flight muscle, cloacal protuberance, brood patch, molt code, primary molt notes How-aged and how-sexed checklist (skull, molt limit, plumage, CP/BP, and more) Recapture flag and all standard BBL disposition codes (300, 301, 600, etc.) Default station and bander pre-fill to speed up high-volume sessions Session summary: today's capture totals by species at a glance CSV export with one tap — import directly into Excel, R, or your banding database 599 NORTH AMERICAN SPECIES Every regularly-occurring breeding, wintering, and migratory species on the AOS Check-list Searchable by common name, scientific name, or 4-letter IBP alpha code Browse by taxonomic family or A–Z Typical band size class shown for every species Tapping any species shows full aging/sexing criteria if available DETAILED SPECIES PROFILES Literature-sourced aging and sexing criteria for the most commonly-banded passerines Organized by season: fall (HY vs AHY), spring (SY vs ASY) Covers plumage, skull pneumatization, molt limits, primary shape, iris color, covert contrast, and structural features Sexing criteria with honest notes on reliability — including cases where CP/BP is the only confident method Field notes on ecology, hybrid zones, subspecific variation, and identification pitfalls Sources: Pyle (1997) Identification Guide to North American Birds Part I; North American Banding Council manuals WING CHORD REFERENCE 75+ species with mean and range by sex (flattened wing chord, mm) Sourced from Pyle (1997) and NABC manuals Filter by male, female, or both Sexual size difference calculated automatically CUSTOM CRITERIA IMPORT Paste CSV data to add your own aging/sexing notes for any species Transcribe directly from Pyle's tables or family-specific guides Stored permanently on your device — no account or internet required All data stored locally on your device. No account required. No internet connection needed in the field. No ads, no subscription, no tracking. Note: All banding must be performed under valid federal and state permits (Migratory Bird Treaty Act, state wildlife agency). Band sizes shown are general guidance only — always verify against the current USGS BBL Bander's Manual for the specific species, age, sex, and population before banding. Data sources: Pyle, P. (1997) Identification Guide to North American Birds, Part I, Slate Creek Press. North American Banding Council (NABC) Passerine and Near-Passerine manuals. AOS Check-list of North American Birds. IBP standard 4-letter alpha codes. USGS Bird Banding Laboratory (BBL) standard age, sex, disposition, and band-size codes.