I must say though that she is a bit undeveloped in one way.
Background- Whilst at uni and studying Piaget, he had 5 (i think) stages of development (concrete, ego centric, some others
) and one of the stages, he said that babies would learn animals, but transfer what they knew about 1 onto the other, ie, a dog has 4 legs, and gets called a dog and therefore if they see a horse, they will call it a dog because it has 4 legs. Same with daddies, other men become 'daddy'
There was some critique done by another scientist
and he said that Piaget underestimated a child's abilities and that they would be able to understand the difference between, dog, cat, horse etc.
Chloe, Jacob and Isobel have never ever, not once confused animals.
Eva see's a dog and she says woof woof, see's a horse, 'woof woof'
Eva see's a duck 'quack quack' eva see's a pigeon 'quack quack' 
I can only surmise one of two things. Either she is younger than the others were when they started being able to verbalise animal sounds, or more likely, i haven't spent as much time with her pointing out animals and making the sounds to her as i did with the other 3.
Sent dp this text at the time.
'Eva, upon seeing a pigeon- quack quack...............got your brains then!