Fleas cannot live on birds - or so I have been told! Unfortunately, you can have fleas in your home without having a furry pet. They come in on clothes and shoes when we step through grass or any other spot where one is waiting to hitch a ride. Fortunately, the fleas will not have a living host on which to lay eggs. If you are having a long term problem, then you may have an outdoor flea problem (usually due to outdoor pets in the neighborhood or area that move freely through your yard. That is much harder to control. I face that problem as I spend much of my time at the barn where I keep my horses and return home to walk through the lawn through which MANY outdoor pets pass. My indoor cat used to have the wonderful luxury of being the depositing spot until I started treating her with Frontline each month. You can treat your yard - but it may be only temporary relief if you have lots of outdoor pets where you live. Best of luck getting rid of those fellas!