An interesting record. It is most likely that this is a bird ringed in Hong Kong. A number of Bridled Tern chikcs have been ringed in the past in HK, and this is probably one of these chicks returning to the breeding sites as an adult. Unfortunately the ring number is not visible to determine for certain which individual this is, or to confirm whether it was ringed here or overseas.
If it is from HK, the bird must be at least 6 years old. No tern chicks have been ringed since 2004, to avoid causing disturbance to the breeding colonies.
