Definitions: (1) ever awake and alert; (2) keenly watchful to detect danger or trouble; wary; (3) on the lookout for opportunities to do good

• He who does not know how to look back at where he came from will never get to his destination. — Jose Rizal (1861–1896) Filipino eye doctor, political activist, & writer
• An owl is traditionally a symbol of wisdom, so we are neither doves nor hawks but owls, and we are vigilant when others are resting. — Urjit Patel (1963-) Indian economist

Birds are always vigilant even while busily feeding or drinking.

Symbols: 1) the cock; 2) the rooster atop of a weather vane