I can’t say why, exactly, but the illustration of the dinosaur doesn’t seem realistic enough. Can we use a photo instead?

that site is both really funny and also depressing. i can understand my friends getting out of the industry due to a) clients being morons, b) race to the bottom from worldwide competition on the one hand and increased automation on the other.
2017-09-23:

One of his main points of contention is the way that we consider dinosaur heads. “The reference has always been crocodiles. The biggest thing is teeth and facial fat. Readers have to be aware that all dinosaurs they see in all media, and especially in popular culture, seem to have their heads flensed. They’ve always got these weird grins with only the teeth visible.” Most animals have lips and gums and lumps of facial fat that change the profile of the head, and cover the teeth. But in many predatory dinosaur illustrations, these are usually missing, making them look fierce, if improbable. “Another trope is what I like to call the ‘roadkill hair’ trope”. Some fossils show signs of hair, which Kosemen says can lead to artists illustrating their creatures with hair only on the parts where it was found on a fossil. However, it’s possible that some dinosaurs had much more hair that they are usually shown to have. “Imagine if you found a raccoon, and only half of the tail was covered in hair, so then you carry that over to a living reconstruction.”

Swans imagined as though they were featherless dinosaurs.