Another species seen on Rio Tarcoles that I don’t see regularly across Costa Rica is the Streaked Flycatcher (my gallery link) and it is very similar to the Sulphur-bellied Flycatcher, which I thought the second of these two photos was (as did Merlin), but after more research, I decided that they are both Streaked and learned that many Streaked have some yellow on their belly. My final decision of putting both photos in Streaked was based also on other markings besides the yellow coloration. And, as always, I may be wrong! 🙂 If so, then this is two species and my total on the river was 41! 🙂
They were together in the same group of trees near the boat dock which is another reason I put them in the same species, but it is not unheard of for two species to hunt together and they would be related, like maybe cousins? 🙂 But also, I found many examples online of Streaked with more yellow like this second photo. You decide. And both eBird & iNaturalist have “checkers” and “identifiers” who also may correct my IDs when submitted to each. 🙂
¡Pura Vida!