I don't get it (when I talk about your critics on this one).
I heard everything quite well, there wasn't any wierd accent, or slang, or onomatopoeias.
The thing I do understand is that with the reptiles, they weren't behaving in the some manner as the mammals apparently were in regards to the fashion choice.
Honestly, that is confusing, since some reptiles are actually far more maternal and protective of young than mammals, and female reptiles act more girlish and feminine than female mammals do.
I think you were portraying reptiles very poorly in this animation, but that's OK.
I got 1 of the 2 jokes you made, and the joke was made very well.
You did very well on this and I enjoyed it greatly.