A professional bird catcher or 'Fowler' in the days previous to firearms captured birds with nets spread on the ground, in traps and snares. There was also a practice of taking young birds from a nest, raising them by hand and using them to call others of their kind to come to their aid, then the hunter would kill them by bow and arrow.
It all sounds very crafty, but the modern day message from this is that 'every trap has a bait.'
Usually the bait is associated with pleasure, profit or advantage. People go to great lengths for these three lures, yet the decoy pulls them in all the time.
We need to be careful these days what we get drawn or enticed into. Many people fall for scams, affairs or false promises. The form of these traps can be crafty and subtle, very subtle indeed. in fact, they are nicely positioned to be so on purpose. Unfortunately, they have lasting consequences and many people wish they had the benefit of hindsight.