The phrase "to watch the birds" means spending time observing and enjoying the activities of birds, such as their flight, behavior, or sounds. Full definition
I so much loved watching birds in the back yard and hanging out on the screened in porch. (bookings.mermaidcottages.com)
My kids and I have been enjoying watching the birds eat at a feeder we placed just outside our home's living room window this winter. (momhomeguide.com)
Your little ones will have fun putting together this heart shaped bird feeder and even more fun watching the birds flying over to enjoy their treat! (kitchener-waterloo.momstown.ca)