Lady bugs are a sign of good luck in many cultures. In the US the most common are the round red spotted ladybugs. However not all ladybugs are round, some look like minature alligators, nor are they red. Their colors range from a cream to red with various spots and stripes. 

Below are a couple of links for information on ladybugs:

 Ladybug facts and photos | National Geographic Kids 

 Welcome Ladybugs into Your Garden: A Step-by-Step Guide - GreatGardenPlans

  Are Ladybugs Good Luck? 6 Things Ladybugs Symbolize - What's That Bug?