Talking - a similar story. My paranoid pediatrician was trying to turn me into a paranoid mother. At 16+ months, Maklin babbled and showed excellent language comprehension ... but still didn't say any actual words (at least not with intention). Suddenly, the switch was flipped.
Mama and Dadda all of a sudden were very intentional, and animals quickly became the theme of his new word acquisition. Within a few days he was saying:
- 'geese' (yes -- he shows clear distinction between Canadian Geese and any other bird)
- sheep say 'baaaa'
- fish say [insert fishy lips kissy noise here]
Also, you may or may not know that I practiced sign language with Maklin very consistently for quite some time, and eventually gave up. He wasn't showing any interest, and just laughed at me when I signed. All of a sudden, as he's starting to try and say words, he started signing as well ... signs I hadn't shown him in months like 'all done' and 'milk'.
Turns out Maklin is a private learner, just like both of his parents. He just wasn't going to start talking until he felt like he had a good grasp on things ... then jumps in with both feet.