You know you can look up images on google and they'll work just fine, but you need to click on them first so they're bigger, and it might take a while to find one that's the right dimensions but it does work
I hadn't gotten around to updating the quiz since the image restrictions changed. It has now been fixed to include all previously excluded birds (apart from the BBBQ), and I have updated the species classification to reflect the latest eBird/Clements taxonomy update.