I've found the best times for watching the animals is between midnight and 6am EST. well, at least thats when its daylight over there. lol
Here's how I do the web cam screen shots. I'm not sure if its the same for everyone though.
1) Start the Webcam video and right click on it, click Play in RealPlayer
2) Click on Tools and then click on Preferences
3) Click on Hardware and make sure that your Video Card Compatibility is set to either the middle or all the way to the left(Most Reliable)
4) Right click again on the video and select Full Screen Theater for good size
5) Open up your Paint Program (usually under Start, Programs, Accessories)
6) Click on Edit and Paste
7) Then finally File and Save As
After I've done that I usually wait until I've got a bunch and then bring them into Photoshop and start editing them, such as crops, contrast or color. Have fun!!!