This highly affordable security camera is quite impressive. Not only do you get an on demand live stream within their app on your phone, but you also get a motion detection system that saves on a free cloud storage. The default settings obviously will need to be adjusted to your needs. I found the only hard part was where to place the camera and also how to position it for the best view. This camera also comes with two double a lithium batteries that can last years depending on the specific settings you have. Overall I find this to be a very good security type solution for your needs. Especially if you want to know who is at your door.
Here are a few clips showing a bird and a squirrel.