Recently, I have been having so much fun sculpting one of my favorite garden visitors, Hummingbirds, from terra cotta clay.  Create a "glittering" ( what you call a group of hummingbirds ) buy ordering a handmade clay Hummingbird for each of your planters.  I hope they bring you so much joy.
 
This listing is for one handmade terra cotta Hummingbird.
Each Handmade Terra Cotta Hummingbird measures: Height: 3 3/4"  Length: 4 3/4" Width: .5"
Clay Humminbirds are mounted on thick wire to help place into arrangements. 
Each piece is sealed to protect clay.