Is it true that when ever a fly land the vomit?

Question

Is it true that when ever a fly land the vomit?

Answer 1

Yes wherever a common house fly lands it vomits to soften the flesh for its proboscis before it sucks the blood.

Answer 2

Answer 1

Yes. I saw it on Animal Planet once

And

This is so true -A fly lands on something it want to eat and vomits, the acid in a fly's vomit soften the food so they can suck it up. What they do not suck up, they leave..

Answer 2

check out the links below. they are really good.

Flies and Regurgitation

Watch the movie "The Fly". They regurgitate on everything they are going to eat.

The acids in their vomit soften the food so they can suck it up. What they do not suck up, they leave. *

Flies excreet digestive juices onto whatever they land on as a method to taste it before they start eating it. So I suppose the answer is yes.

They also regurgitate on everything they land on. It is how they can land on the same spot they where earlier. They follow their wastes smell. *Though it is so totally nasty, it is true. I heard it on the news. They vomit on our skin and everything else they land on.

And here is an opposing view:

Well, has anyone actually watched a fly land. It's not like their mouthparts always touch the landing area of their flight. I have watched a fly land many times on non-edible surfaces and,it certainly never looked like anything was excreted from them. A fly is not always in the process of eating. Also a fly has a very good sense of smell. It doesn't make any sense for a animal to try to eat something that it knows it can't. Plus a fly would dehydrate itself completely at some point. I mean, come on.

And is it vomit or excretion from the other end?

I'm not sure about this, but I always thought it was that a fly craps on everything it lands on? Seperate from the crapping and landing, I was also told that they DO vomit on whatever they eat, to help the process along. But this would be two different questions if they do c**p where they land, AND vomit on what they eat. Hmmmmmmm...

I do not know if it is vomit or p**p, but my question is what difference does it make? Whatever it is, is sickening, not to mention unhealthy. If you want to prove they leave either vomit or p**p on everything, do an experiment. Go to a place where there are lots of flies. Lay down a piece of white paper and leave it for a time. I think 30 minutes would be long enough, but it might take longer. Return to the paper. Look at the little dots. Whatever it is, vomit or p**p, it came from the flies.