This little bird reminds me of people who do not know or ignore the Word of God, and how they are vulnerable to Satan's attacks.  In ignorance, with no spiritual weapons, they are suddenly consumed by evil.

 

"Put on the whole armor of God, that you may be able to stand against the wiles of the devil. For we do not wrestle against flesh and blood, but against principalities, against powers, against the rulers of the darkness of this age, against spiritual hosts of wickedness in the heavenly places. Therefore take up the whole armor of God, that you may be able to withstand in the evil day, and having done all, to stand (Ephesians 6:11-13, NKJV)