A far more embarassing confession that I forgot in my initial post...
On my first and to date only visit to Chester Zoo, I looked forward to four target species - Tuatara, Tentacled Snake, Balabac Chevrotain and Coquerel's Sifaka. Sadly, avian influenza meant that Monsoon Forest (where the snakes are kept) and Tropical Realm (where the Tuatara and chevrotain are kept) were both closed, but I still had hope in the sifakas.
I made it to Madagascar, where they are kept, and it started pouring it down with rain. The Fossa and lemurs were nowhere to be found, so, too tired and cold to cope with the rain, I didn't check for any indoor viewing, and head into Dragons in Danger, the nearest building. Once the rain had passed, I completely forgot about the sifakas, concluded that there was nothing special in Madagascar, and spent the last hour or so of my day returning to highlights from across the visit, namely Spirit of the Jaguar, Realm of the Red Ape and Elephants of the Asian Rainforest. As it was the day before New Year's Eve, I brought myself a Chester Zoo calendar for the new year as I was leaving. In a restaurant that night, I looked at the calendar, saw a picture of the sifakas, and never felt that humiliated in my life.