Seeing large birds in flight is eye catching. Seeing song birds and ducks and geese is an every day thing. But bigger birds are not so common.
The heron is moving to a spot to fish. He will stand on his post and watch for a fish to swim by and catch their meal.
Just as this heron gains its sustenance by waiting, we can renew our strength by waiting on the Lord.
Isaiah 40:31, 41:1a
"Yet those who wait for the Lord
Will gain new strength;
They will mount up with wings like eagles,
They will run and not get tired,
They will walk and not become weary.
Coastlands, listen to Me in silence,
And let the peoples gain new strength;"