Byangoma (Bengali ব্যাঙ্গমা, feminine Byangomi ব্যাঙ্গমী) are legendary human-faced birds of Bengali folklore, appearing notably in the fairytales of Thakurmar Jhuli, where they are portrayed as wise, fortune-telling birds that help the deserving.
In Thakurmar Jhuli by Dakshinaranjan Mitra Majumder, the fairy-tale "Lalkamal Neelkamal" describe how the nestlings of these birds are sightless at birth and how few drops of blood from a donor can activate their sight.
[1] Lalkamal and Neelkamal are the eponymous princes who seek help from these birds living on a tree at the edge of Tepantorer Math (The Field of Three Horizons).
The birds display remarkable strength in carrying the princes on their backs safely across the very large field.
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