This looks like it could be a species in the Funariid family, maybe a spinetail. It could be one of several species, and not knowing the location makes it much more difficult. If it is a spinetail, and if it was seen in northern South America, then my guess would be either Azara's Spinetail or Rusty-backed Spinetail. Neither of these is a perfect fit though, so those are more guesses than pronouncements.

i think the first one is a grey pileated Finch



but i have no idea about the other one- it looks like a finch though