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The case is very small and it's an off white color.

The thing living inside can come out of either end. It's a black and white looking worm. It will poke its head out and move everywhere!

They are all over my back porch and some are even coming in my house!

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    $\begingroup$ This is too many Caps in one title and too little information (time of year, location,...) $\endgroup$ – skymningen Jul 3 '17 at 12:00
  • $\begingroup$ Could you link more (and clearer) pictures please? $\endgroup$ – Charlie Jul 3 '17 at 12:00
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    $\begingroup$ Related: biology.stackexchange.com/questions/15845/… $\endgroup$ – arboviral Jul 3 '17 at 12:30
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    $\begingroup$ @arboviral I also thought it was a duplicate... however, the answerer in that question mentions several families, but not Tineidae. $\endgroup$ – user24284 Jul 3 '17 at 12:33
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    $\begingroup$ Related Question. $\endgroup$ – Tyto alba Jul 3 '17 at 16:04
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This is just a larva of a moth from the Family Tineidae, most probably Phereoeca uterella (known as plaster bagworm or household casebearer), or Tinea pellionella (known as case-bearing clothes moth).

As you can see, the larva of this moth...

... constructs a protective case from silk and camouflages it with other materials such as soil, sand and insect droppings. (from Wikipedia)

Here is a better picture of Phereoeca uterella, from the entomology deptartment of the University of Florida:

enter image description here

Here is the imago (adult), for comparison:

enter image description here

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    $\begingroup$ @Lynn If this answer helped you, consider "Accepting" it (hit the check mark under the down-vote icon). Glad you got what you were looking for! $\endgroup$ – paracetamol Jul 3 '17 at 13:41

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