The odor also attracts arthropods which may later invade other areas of a building. Bat guano may provide a growth medium for microorganisms, some of which are pathogenic (histoplasmosis, for example) to humans. Guano accumulations may fill spaces between walls, floors, and ceilings. It may create a safety hazard on floors, steps, and ladders, and may even collapse ceilings.
In Washington DC, it's a fairly common. There, it's usually called Crispy Shredded Beef or Crispy Fried Shredded Beef. The beef is really crunchy (if done right) and thin like match-sticks. The dish usually has shredded celery, carrots, and scallions in it. The sauce is somewhat sweet, but it has a little bite to it.
So you wonât end up with a stir-fry beef thatâs watery and tough and chewy to eat. Never put too much food in a wok, donât crowd the food. Lay the pieces of meat out flat in the wok, taking care not to over crowd. (Note: a family sized, 14-inch diameter wok can handle Â½ pound of beef at a time. Otherwise, cook the beef in batches as needed.) Instead of immediately stir-frying, let the meat sear for about 30-45 seconds, before starting to stir-fry. Then stir-fry the meat for a couple minutes until it changes colour, splashing with a small amound of rice wine or dry sherry if desired. Remove the meat from the pan to keep it from over cooking and drain. Add the beef back into the pan as called for in the recipe. (As in this recipe for Stir-fry Beef with Bamboo Shoots)