Usually when you see a pack of howler monkeys there will be 1 or 2 babies among the 10 - 15 monkeys traveling together.
My wife took the best photo of a howler monkey that I have seen. I have shown it before, but am posting it again for those who have not been following this site for a long time. She was able to get a camera angle where there was no sky in the background so she could get a better exposure than the typical photos of howler monkeys silhouetted against a light sky.
My younger son, Stuart, who is the technical consultant to assist me with this website, got a great video of some howlers. We stopped along side the road when we saw a group of howlers walking across the telephone wires. He saw where the group was jumping from one tree to another and staked out a spot where he could get videos of the monkeys flying through the air.
The tease for tomorrow is that I will show something else that commonly hangs out in the trees in Costa Rica.