Red-flanked Bluetail BTO - British Trust for Ornithology

Hungarian Birdwatching - Professional Birding in Hungary

Red-flanked bluetail spotted for the first time in eastern US

BTO Publications – BTO Services Ltd.

Blackcap – Pembrokeshire Avifauna

Red-flanked Bluetail - Tarsiger cyanurus

Migration blog (9th – 15th October)

Species and codes - British Trust for Ornithology

Mike Pollard nature in the middle of England and sometimes far beyond

Red-flanked Bluetail - Shanghai Birding 上海观鸟

BTO books and guides BTO - British Trust for Ornithology

Red-flanked Bluetail - eBird

Red-flanked Bluetail (Tarsiger cyanurus) - North American Birds - Birds of North America