The yellow threw me off. I've found others that have been orange-reddish. It's astounding that they can live in a plastic bag in my fridge for so long. I guess there's something to say about being cold blooded!

"There are two species of ladybugs, the Mexican bean beetle and the
squash lady beetle that are not carnivorous. Instead of eating garden
pests, they eat your garden. Luckily, they look similar to each other
and unlike most other species of ladybugs. The Mexican bean beetle has a
yellowish body covered with 16 black spots. As its name suggests, it
feeds on the leaves of most varieties of bean plants. The other imposter
to keep an eye out for is the squash lady beetle. The squash lady
beetle is also yellow, but it has 14 black spots rather than 16. Its
favorite foods are the leaves of squash, cucumber, and watermelon
plants."

It looks like a cucumber beetle to me, and they are bad news if they get in your garden.

Well, they're hearty suckers!

The orange reddish ones are evil. They swarm when bean fields are harvested and will completely cover the west side of your house in the afternoon. They also smell really bad when you even try to move them.

Now that would be really bad.

One year we were house painting ith oil-based white. It was October and the leaves were beginning to fall -- that's when the orange Asian ladybugs begin looking for winter lodging. Our white trim was soon dotted with the things. The stuck to the wet paint, fell into the can, flew into our eyes and mouths.

There are a few in the house now. I feel bad for them and in February put the occasional loner on a cotton ball moistened with water or move them to my geraniums.

I agree with others have mentioned, it's probably a squash or cuke beetle. Definitely not a lady bug as I know them. Aren't those usually rounder, orange, with dark spots? The Asian lady bugs are the ones that invade your house looking for a place to winter over, I find them in the corners of my crown molding in the bedroom. With two brooms connected together I manage to reach up and knock them down and squish them. They also have a strong odor. The beetles come from the soy bean fields surrounding my house. As soon as the soy beans are harvested, the beetles start to march.

It's a spotted cucumber beetle, as has been said. It's not related to any kind of ladybug, which come in a variety of colors, but not yellow.