These tree parasites are known as gallitos or patas de gallo. Once again, I am going to abuse from your kindness and ask to provide the English name for this plant that is often found as a parasite in trees.
Gallitos are an integral part of the Guatemalan Christmas decorations, quite often found underneath the Christmas tree or next to the nacimientos.
© 2008 – 2020, Rudy Giron. All rights reserved.

These beautifully flowering Bromeliads (Gallitos) thrive on nothing but air and water.
They are commonly called “Air Plants” in the UK because they are epiphytes. Whatever they are called, they are lovely to to look at and a great addition to your current Christmas series.
Tillandsia is the right name for this gallitos. Quote from :
“A Tillandsia is a Bromeliad…but not all Bromeliads are Tillandsias. Bromeliad is the Family name. Tillandsia is the genus.”
Thank you for the correction, I was also confused with the two names, lol, I forgot about this plant in the Guatemalan Christmas decorations, it has been a long time since I see any pictures from Guatemala, until I subscrive here, have a blessed and Joyful Christmas!!!
They’re called air plants in the US too. See:
http://www.airplant.com/