No, you can't kill migratory birds, huge fine (sometimes
$5000, possible jail time) - takes away from pond dollars
and pond time.
Was your bird a heron, steel blue in color, buff colored
neck, some black on head, if old enough will have a black
crest, long beak.
Doesn't matter really as it is a fish eater all the same.

You can
- use an electric shock pet fence
- motion activated sprinkler
- net your pond
-surround your pond with fishing line, especially in the
area where the bird lands

ALL these will work. It just depends on your particular pond, how it is
situated, how your yard is set up and your particular heron. You may
have to experiment. Good luck and let us know how it goes. We like to
hear success stories!

kathy :-)