I saw this little bird flitting around outside Zoo Ave in Costa Rica, and was quite pleased when it stayed still long enough to get a photograph. It turned out to be a rufous necked (naped) wren. In my experience, wrens don’t usually stay still or visible for long, so aren’t very amenable to being photographed. This variant is larger than the average wren so maybe has different habits.
This was born out when we saw one hanging around the pool at our hotel in San José. Here the tail is tilted up in a characteristic wren fashion.