Dipper in hedge

Observation - Dipper in hedge - UK and Ireland. Description: Plump dark brown bird with brilliant white bib in and beneath a hedge about 100 metres from river in flood. Bobbing and dipping movement on the branch and ground. Suspect very hungry and unable to feed in river in present conditions?

Plump dark brown bird with brilliant white "bib" in and beneath a hedge about 100 metres from river in flood. Bobbing and dipping movement on the branch and ground. Suspect very hungry and unable to feed in river in present conditions?