Fledgling identification help

Please can somebody help me with identification of two fledglings? Both were brought in to the vets (separately) and could not be left/returned to their found location as they were being stalked by cats. Currently both taking feeds really well but I’m hoping I can be a bit more specific with their care prior to (hopefully) release if I know what I’m dealing with!

fledgeling 1:

fledgling 2:

Any help would be greatly appreciated!