When Maya and Willie meet the dung beetle he's standing on his feet and pushing the dung ball as he walks forward. In actuality dung beetles move their dung balls by standing on their hands (or rather their front legs) and pushing it with their hind legs as they walk backwards. I shudder to think how many of our little darlings had the wrong information in school after seeing this movie! (just kidding - great movie for kids)
When Flip is introduced to Maya and it cuts to the scene in which he shows Maya the meadow, his antennae are missing. In the next scene they are back again.