I found a live bug in my salad!

The problem with that is 99% of the time does not lie within the resturant as the source.

With fresh produce alot of times bugs are allready crawling around in the produce, and the produce companies leave it to the resturant to clean it all up. So if the resturant isnt paying attention, or just skips cleaning the produce cause they think its allready been cleaned then stuff like that can happen.

Thats a bad response from the manager though, I would be more upset about that than finding the bug. Its gross, but you are eating something that grows from the ground, lol. But managment should have offered a refund and told you they will look into and fix that problem.

Bingo. Lettuce and grapes are the worst. I worked at a grocery store for my H\S job and there were ALWAYS bugs in the lettuce and spiders in the grapes. One time a black widow crawled out from a bag of grapes I was putting out. I almost crapped my pants. I'm not usually afraid of spiders\bugs but that one got away from me cause i was afraid to go near it. 2 weeks later when we were cleaning under the table the grapes were on we found it dead. Whew!
 
Well, a "mosquito looking bug" is definately a cause for concern. Not the worst bug to have in your salad, but bad none the less.

Managers will give a full variety of responses to calls like this. I'm not surprised at his response. You didn't get into detail about your tone to him regarding this, so maybe that contributed to his response. Another thing to consider is the order was a take out. It's no surprise to me that 95% of the "bug in food" complaints I know about are take out orders. It's weird how people that eat in the restaurant never get bugs in their food.

BurningRubber makes a great point. Produce does get shipped with bugs. The problem with this case is that the lettuce should have been washed at the facility. That should have take care of the problem (if there was one).

DopTopPony's point about every restaurant having some type of pest infestation is completely incorrect - at least by my experience. Of course, I've only been in about 600 kitchens and maybe 10% of them had a problem with pests. I'm talking flies, bees, drain flies, mice, roaches, anything.

The code enforcement officer will likely pay a visit to the facility. If you requested a follow-up, I'm going to guess that they'll find nothing.