I stood watching this Grey Heron for a while as he moved in 'Stealth Mode' slowly around a shallow part of a lake in the Parkland. His head movements showed that he was obviously tracking a fish and was waiting for the right moment to strike.
The fish caught was a Perch which can be identified by the spiny front dorsal fin. If you are feeling sorry for the Perch, consider that they are in turn carnivorous and will feed on smaller fish.
I have not shown the 'swallow'.
I didn't want to put you off your breakfast.