Do you know when will this FG released?
Zona Tropical has published a new FG for Nicaragua. I wrote a brief review: https://www.birdforum.net/showthread.php?t=362364
No need to repeat it here. But its conclusion is that this is a FG that can be highly recommended.
It will be interesting to compare it with the upcoming FG for the whole region:
Birds of Central America: Belize, Guatemala, Honduras, El Salvador, Nicaragua, Costa Rica, and Panama
Andrew Vallely and Dale Dyer