I have just read an interesting article about the "isometric" growth of pterosaurs. I understand this to mean that the proportions of the body parts on hatching and on reaching maturity do not change ie no large eyes small beak when a chick. Is this confined to pterosaurs? Mammals and birds do not seem to develop in this way.

Depending on quite what you read, it might very well relate to some current research I am doing to pterosaur growth! There does appear to be some differences between species but in general they do indeed seem to be fairly isometric, but this is becuase unlike say birds or mammals (including bats), juvenile pterosaurs could fly and so young animals had simialr proportions to adults which would facilitate this.