Planning a birding trip to Costa Rica? You might be wondering which are the most biodiverse areas for birds. It’s a fairly common question and a good one. After all, what birder wants to go to the least biodiverse areas for birds? That high avian diversity is one of the main reasons birders visit Costa Rica, some other reasons being “quetzal”, “Wrenthrush”, “umbrellabird”, and “Snowcap”.

In general, the more birds the better and, in that, Costa Rica fits the bill. No, we aren’t the most avian diverse nation on the planet but, we do have a heck of a lot of birds per square kilometer (or mile or league). With most also being quite accessible, it’s no wonder Costa Rica is a top destination for birding tourism. So, which areas have the most bird species? Which areas outperform for avian diversity?
In a sense, I could just say “the entire country”. From the Central Valley, Costa Rica is small enough for me to drive an hour or two in a few different directions and reach vastly different avifaunas. Seriously, as I write, there are over 700 bird species within a radius of 50 miles. It’s true! In a show of obsession for accuracy or curiosity or getting carried away with playing with Google Earth, I measured a 50 mile line stretching from my home in San Francisco de Heredia and made a circle.
I discovered that I am still amazed by the short distances created by a straight line in Costa Rica and, that my 50 mile birding radius encompasses everything from dry forest habitats to Monteverde, Carara, Caribbean lowlands, foothill forest as far as Turrialba, part of the General Valley, and the near continental shelf edge offshore from Quepos. In other words, I’m, smack in the middle of a heck of a lot of bird species. Within this Google Earth area, I counted 598 resident bird species and 160 migrants. Since I left out non-annual vagrants including the Aplomado Falcon currently hunting south of Jaco, there’s probably a few more.
Yes, definitely 700 plus bird species within 50 miles so how come I haven’t recorded that many this year? That stems from a fair percentage of those birds being rare or hard to detect, and me not having visited certain areas long enough this year to see them (such as the open ocean and a few other choice spots).
With all those birds in mind within such a short distance, we could say that the most biodiverse area for birds in Costa Rica is Costa Rica itself but, since we can’t travel “as the crow flies”, we’re better off talking about much smaller areas. These are the ones that come to mind.
The Carara Zone

The Carara area is arguably the most avian diverse area in Costa Rica. It’s got a trick up its sleeve but, there’s no other site of similar area in Costa Rica (or Middle or Central America) that harbors as many bird species.
The crazy bird numbers don’t come from the national park although the mature, protected forests do play a vital role. They stem from Carara being a massive ecotone that blends dry forest with rainforest, mangroves, second growth, and wetlands. Yep, all those habitats all very close to each other. The end result is massive bird diversity (along with other stuff).
Monteverde

This famous and heavily visited area is also a major hotspot. Sort of like Carara, all those birds living there are explained by sizeable areas of mature, protected cloud forest, some slightly lower elevation forest on the Caribbean slope, and dry forest habitats on the Pacific side.
In other words, Monteverde is also an ecotone of sorts, one with hundreds of bird species. In the past, when we did Christmas Counts there, I think we routinely turned up more than 400 species.
Poas Route 126
While the high elevations on Poas Volcano don’t host as many species as other areas in Costa Rica, when we also consider a surrounding area that includes dry/moist habitat birds in the Central Valley and middle elevation and foothill habitats on the adjacent Caribbean slope, we’re talking a lot of bird species.

This general area also having some of the most accessible birding to the Central Valley also earns points.
Bijagua

The Bijagua/Volcano Tenorio area also racks up the bird species. Like Monteverde and Carara, it likewise acts as an ecotone where dry habitats meet mature, wet foothill rainforest. Throw in some small wetlands and a trail or two that reaches cloud forest and we have a huge number of bird species. There might be around 400 possible.
Sites with Foothill and Lowland Forest
The other main sites in Costa Rica with major bird diversity are any place that combines foothill rainforest with lowland rainforest and/or cloud forest. Foothill and lowland forest on their own are always high diversity. Combine the two and you’ll have more than enough birds to look for even during a week of birding.

Sites that come to mind are Rancho Naturalista, Hotel Quelitales, Reserva Las Brisas, parts of the Osa, Esquipulas, the remote Pitilla Biological Station, the Arenal area, and the San Vito area.
Wait, but what about Las Selva or Tortuguero or the Osa and the La Gamba area? Yes, those areas have lots of birds too, are fantastic, and you’d be birding wise to visit them. However, when talking about similar-sized areas that have ecotones, those sites seem to have more species. No matter what, as long as you bird in good habitat when birding Costa Rica, you can’t go wrong!
To learn more about birding at the sites mentioned above and many others, support this blog by purchasing my 900 plus page ebook “How to See, Find, and Identify Birds in Costa Rica”. I hope to watch birds with you here in Costa Rica!







































