The average Green Winged Macaw can generate around 400 PSI in one bite – that’s much stronger than the average human bite!

Moluccan Cockatoo: It’s bite force suprasses even that of the Macaw, weighing in at over 500 PSI.

https://www.parrotwebsite.com/which-parrot-has-the-worst-bite/

I guess that "fall" is in quotation marks because it's a quote. But then shouldn't "next fall" be in quotation marks? So maybe it's not a quote, but the author does not like that they have to write American English and wants to write "autumn" instead! I guess we'll never know.