I have a few water features around the yard that attract breeding tree frogs every spring. Since the sarracenia attract lots of flying insects all the frogs have to do is sit around on the pitchers and wait for a meal to come to them. Below is a link to a slideshow of photos I have taken of tree frogs hanging around the sarracenia in my yard:
https://www.flickr.com/photos/enjoypics/albums/72157686680384621/show
https://www.flickr.com/photos/enjoypics/albums/72157686680384621/show