Flickr has the concept of a “Gallery” where you can build a collection of up to 50 of your favorite photos from other peoples photostreams.
Some users found this limitation of 50 a problem and hence wanted the ability to be able to group multiple galleries together.
This Slickr Flickr Pro features allows you to list the galleries you want.
The usage is as follows: search=”galleries” gallery=”gallery1,gallery2″
Here is an example. I have two galleries; one called Cavalier King Charles Spaniels and another called Afghan Hounds. Below I will merge them into a single display. All I need to do is grab the gallery ID from the URL on each gallery on Flickr:
slickr-flickr search="galleries" gallery="72157625063376003,72157626488994105" type="gallery" thumbnail_size="small" thumbnail_scale="75"