Is it possible to NOT password protect certain apps on iPhone?

I have several apps that I use a lot and have to key in security code to use each time. One of the most frequently used is a birdwatching app used out in the field. I have resorted to turning off the Passcode Lock when birdwatching and setting an alarm to remind me to turn it back on in a few hours. A bit of a pain and not so secure. Is there a way to simply make some of these apps not password protected? If someone wants to illegaly look at my iBird App, that's ok with me. Thx.