Blackbird scoffing tadpoles

Observation - Blackbird scoffing tadpoles. Description: We have a wildlife pond 11 by 6 feet and there are plenty of small tadpoles at present. A male blackbird has acquired the habit of standing on plants where the pond is shallow and the tadpoles collect, and eating a fair number of tadpoles. It comes back

We have a wildlife pond 11 by 6 feet and there are plenty of small tadpoles at present. A male blackbird has acquired the habit of standing on plants where the pond is shallow and the tadpoles collect, and eating a fair number of tadpoles. It comes back for more some time later. We have had the pond for 16 years and never had this occurence until now.