Well if it looks to be the biggest bug yeah but I would suggest emptying your pockets that way you can fill it up with bugs and choose the best one you never know if you'll find a birdwing!
^_^ Actually that might not be a good idea it takes too long just hand it in I handed one in and beated a record
the biggest when i turned on animal crossing at around... 5:45, was a cockroach or something... i beat that, then at 5:59 won with an oak silk moth, 319 mm woooo...