Imagine you never in your life seen a pelican or any other bird. You only read about them in text. Detailed descriptions but still just descriptions. And now you would need to one shot draw it. Might be a bit hard.

This is for example the result of a taxidermied lion in Sweden when the guy doing the job never ever seen a lion or a photo of them and just worked off descriptions. https://www.snopes.com/articles/344637/the-lion-of-gripsholm...