Thanks, Capt. Shutter. I'm pretty pleased with the way most of the photos turned out. I was using my 70-300 (non-L), as I felt my 70-200 was too heavy to drag around the zoo all day.
This wasn't smart, as I was most interested in getting some nice shots of the Rockhopper penguins yesterday. I didn't realize how dark the penguin enclosure is: until I was trying to take photos. The Rockhoppers weren't cooperative, either. Only one of them was out, and he chose to present me with his back for most of the time I was in there. He wouldn't display his crests for me, either. Next time I'll try my 70-200, and maybe the Rockhoppers will cooperate. They're usually quite cheeky and funny to watch.
The gorilla photo is of Kakinga, the leader of our troop of western lowland gorillas. I have some nice shots that show off his beautiful silver back, but I liked this one the best as he's making eye contact. I should maybe try to lighten the shadows on his face a little bit.
He's a very valuable member of the "Gorilla Species Survival Program," not only for his genetic contribution but for his temperament as well. Kakinga is a son of Jambo (https://www.youtube.com/watch?v=W-CMxMv34_A), and he shares his father's gentle and protective temperament. He's also one of the subjects of study in the "Great Ape Heart Project." I was surprised to learn that cardiovascular disease is the leading cause of death of great apes.
Kakinga is getting up there in age. I believe he's 38-years-old, and their life expectancy in zoos is 35-45 years (though at least one live to 54). In the wild their life expectancy is 30-40 years. Kakinga's father lived to 31. I'm hoping to document him a bit more, while he is still with us. He really is stunning.