JohninKansas' comment made me think of the song lyrics to "The People are Scratching". They are currently trying to eradicate Urasian Milfoil in a large lake near here by introducing a fungus. And many of our homes are plagued by the Asian lady bugs they brought in for something or other.We're just sooo smart aren't we?

I agree with the others who say a few mice- a few photos won't disrupt the balance, there seems to be some grace built into the system. However, after you tie your mousey Faye Wray, you might just want to forego the jungle drums for the owls sake:)