Many residents of southern and central Florida do not realize they may have an invasive species right in their own backyard. The cane toad is a native of Central and South America and was introduced to Florida as a means to control white grubs in cane fields.
1 Breathing difficulties: Shortness of breath, wheezing or noisy breathing (called stridor) may all be signs of lung cancer.  Loss of appetite: Many cancers cause changes in appetite, which may lead to unintended weight loss.
The narrowing of the airways can be caused by inflammation from asthma, an infection, an allergic reaction, or by a physical obstruction, such as a tumor or a foreign object that's been inhaled. The most common cause of recurrent wheezing is asthma.