Although I prefer grub season (small tasty bits in the ground, you just snoofle their location, dig them up, and enjoy), the Mutatoe likes fledgling season. For me, its just too much work for so little reward.
Chase the squeaking thing, catch the squeaking thing, squish the squeaking thing, listen to the human woman scream, give the non-squeaking thing to the human woman who throws it over the fence, and that's it. No tasty reward for all of that hard work.
This season its been Mutatoe 4, fledgling birds 0. You'd think they'd learn by now.