Clearly there are a lot of different mammals in Costa Rica, most of them don't seem to stick around long. Below are examples of some that we saw and were able to photograph.
We didn't see any cats. Nearest to an actual sighting was at Esquinas Lodge during an early morning walk when something that we suspected was an Ocelot (as one had been frequenting the camp recently) dropped out of a nearby tree and just raced away through the undergrowth.
This was one of the first Sloths we got a good look at. Up in the trees near the lagoon at Tortuguero. Sloths are quite special creatures that are notoriously unhurried. They just seem to eminate 'cool'. It certainly felt special to see them.
Also seen in various places, with this one photographed by Peter near to our hotel in La Fortuna.
We saw several Agouti during our trip. This one, about the size of a small dog, was seen during a forest walk near to Esquinas Rainforest Lodge.
Seen under a large umbrella plant leaf during our night walk near Esquinas Rainforest Lodge, this clever bat was probably just getting ready for an evening foray. The Tent-building Bat chews the ribs on the underside of a large leaf, causing the leaf to fold creating a nice shelter for the bat. Somewhere to hide out from would be predators in the day time and shelter from the elements too.
The bat was in the lecture/meeting room at Tortuguero. Most of its 'colleagues' had gone off into the evening sky. Not sure of the species at the time of writing.
A bit neck-craning to catch this pair of bats roosting quite high up on a tree in Manuel Antonio NP. We also saw them at Esquinas Rainforest Lodge (thanks Ann).
This deer appeared right next to the path as we were exitng the Manuel Antonio NP. Pretty little thing just going about its business. Didn't seem bothered by us at all. This is the national mammal of Costa Rica.
At the end of the trail in the Arenal NP, we came to a headland over-looking Lake Arenal. After standing for a few minutes looking at some Kingfishers, this Giant River Otter came cruising around the corner giving us an exceptionally rare view. Unfortunately it didn't stick around long.
We saw Howler Monkeys in Tortuguero, heard them in Monteverde (at dawn!) and saw some again in Manuel Antonio NP, where this shot was taken.
The Spider Monkey proved to be quite elusive. This mother and baby was spotted on our way out of the Tortuguero NP, high up up in trees along the river. We did see other in the national park, but never got a clear view of them.
We first saw White-faced Monkeys in 'downtown' Manuel Antonio, crossing the street via the overhead cables. This pair were part of a troop of monkeys in the national park itself. Though we did have clear views, this one seems a better representation of their habitat..
Another resident of the Manuel Antonio NP, this racoon was sat up in the trees overlooking the beach. Perhaps looking to steal the odd packed-lunch from an unsuspecting bather.
A small troop of Coati were wandering through the hotel garden in Monteverde. Peter got this nice photo of them.
The first image was captured in the hotel gardens at Savegre. The second one during our forest walk, again in Savegre.
Seen in the trees below the hotel restaurant in Monteverde.