(by Cornell Lab) – Completely Free

| Feature | Rating | Comments | |--------|--------|----------| | | ⭐⭐⭐⭐⭐ | Based on the famous Collins Bird Guide book – covers 700+ European species with illustrations, maps, and detailed text. | | Illustrations | ⭐⭐⭐⭐⭐ | Stunning, accurate artwork by Killian Mullarney and others – better than many photos for ID. | | Bird Sounds | ⭐⭐⭐⭐ | High-quality recordings for most species (but missing for some vagrants). | | Comparison tool | ⭐⭐⭐⭐⭐ | View two species side-by-side – excellent for tricky IDs. | | Search & filter | ⭐⭐⭐⭐ | By size, color, habitat, etc. – powerful but UI slightly dated. | | Offline use | ⭐⭐⭐⭐⭐ | Works fully offline after download – perfect for field use. | | Updates | ⭐⭐⭐⭐ | Regular updates (taxonomy, new species, fixes) – but only in legit version. |

: Includes over 3,500 artworks by Killian Mullarney and Dan Zetterström, designed to show birds in various plumages and flight positions.

Access over 1,100 curated songs and calls to identify birds by sound in the field.