You will need
a shallow, watertight bowl of some kind
(upturned dustbin lid, a large circular plant tray)Some stones or gravel
Bricks to raise the bowl up if it doesn't have a plinth
Rainwater or tap water
Fill the base of shallow waterproof Container with Gravel. A bowl, dustbin lid or tray is ideal.
Elevate your birdbath on a few bricks, so as to protect it from cats and squirrels.
Fill it with Rainwater or Tap Water and position a few rocks to emerge above the water-line.
Positioning your MyNaturewatch camera is open to interpretation - it works well in an overhead position, facing the bird bath or even in the pond. Be imaginative.