Troupial (Icterus icterus) pairs begin to build nest

I have the pair of Troupial (Icterus icterus) since last summer and up until now, they still shy when I come near their aviary.  Few days ago, I noticed that both the male and female start to tear off bit and pieces of leaves and hold in their beaks pieces of small branches, feathers, etc.  so I put some long grasses, bit of vine, small branches, coconut fibers, dried bamboo leaves, etc.  Hopefully after they finish building the nest, they will lay some eggs.  I'm so excited!

The female with pink band on top of the nest. The pair below with the male in blue band