Earl,* I know the feeling! But it's probably not something you said! I felt the same way when birds stopped coming to my garden for a prolonged time, but then I realized a Red-Tailed hawk was close at hand!
THAT was most likely reason I hadn't seen birds in my garden OR in the Ailanthus Trees which are in my courtyard. *
As for the reason Earl (the dog featured in the comic strip atop this entry), not seeing birds, you'll have to ask Patrick McDonnell, his creator.
I adore Earl and all of the MUTTS community (as evidenced by the number of entries within this blog which discuss them).
Btw, Red-tailed hawks are featured in volume three of my book series, Words In Our Beak.
Here's the purchase info re our book series:
Volume One: ISBN: 9780996378529
Book Seller Info: http://bit.ly/2AFZDCz
Barnes & Noble On-Line: http://bit.ly/2AAnB26
book culture On Columbus (a bookstore on the UWS in NYC): http://bit.ly/2FsC1Uf
Book Seller Info: http://bit.ly/2q75g8e
Barnes & Noble On-Line: http://bit.ly/2G65m6H
Barnes & Noble On-Line: http://bit.ly/2vedQot
EACH OF THESE BOOKS CAN BE ORDERED FROM ANY PLACE SELLING BOOKS BY GIVING THEM THE TITLE, OR ISBN, OR MY NAME, PATRICIA YOUNGQUIST.