I agree with Raptor. ever since Kamen Rider Franchise starts with Bug motif while Sentai series during Zyuranger (or Mighty Morphin Power Ranger) starts with Dino motif, those two are common motif like they use it multiple times (Showa era Riders use Bug Motif as their motif (with the exception: Amazon, Stronger, Super-1), since it's the main motif) and i think Dino motif attract more kids who love dinosaur to watch Dino-themed Sentai team (or ranger team).