Yes Herons are very  able to look after themselves from that eagle which  may be a white tailed sea eagle if indeed there was any white to its tail hard to say it could also be a golden eagle or Stellar sea eagle dependant on the locale

Danny O'Byrne  http://www.digitalartzone.co.uk/

"All the technique in the world doesn't compensate for the inability to notice" Eliott Erwitt