Niels, Andy, Thank you! Tennessee Warbler makes sense.
I did a little extra research on the flycatcher. Based on the perception of size and tail pattern I excluded Ash-throated and Nutting's Flycatchers. I also discovered that brachyurus subspecies of Brown-crested Flycatcher of Costa Rica...
Please help me identify these birds, photographed in January in Costa Rica, in Guanacaste province, in the surroundings of Ensenada Lodge.
1. Which Myiarchus flycatcher?
2-3 Different bird
4-5 A vireo?