When it comes to keeping birds from doing their business on your porch rails, you have several DIY options and home remedies you can try: 

• Tie a fishing line from one end of the deck post to the other. Birds won’t be able to see the line across the railing, so they can’t land on it.  

• Hang wind chimes close by, which may scare birds away. 

• Apply a bird gel repellent to the railings, which contains smells that birds generally don’t like. Or, similarly, you can apply citronella or lemon oil around the railings, since birds don’t like strong smells.

You can take multiple approaches to keep animals out of your edible landscape. You can use natural repellents such as mint and cayenne pepper to deter them from your garden. You can also build a fence (or opt for a privet hedge) or keep the most enticing plants in a sectioned-off area. The most efficient method of keeping your four-legged guests at bay is to determine what animal it is and create a customized plan for them. 

No, mothballs do not keep bats away. Not only are mothballs completely ineffective when repelling or removing bats, but using them could be illegal, depending on where you live. Remember, bats are federally protected, and it's illegal to use chemicals during the removal process, and mothballs tend to fall into this category.

They can have a deterrent effect on birds to some extent. The reflective surfaces of these objects, such as aluminum foil strips, CDs, or reflective tape, create flashes of light and movement that can startle or confuse birds temporarily. However, some birds can become accustomed to these visual disturbances over time and might adapt their behavior accordingly. For a more sustained solution, combining shiny objects with other deterrent methods shared here is often beneficial for creating a more comprehensive and effective strategy for bird control.