I hate going round an enclosure or walk through that as no identification plaques for the animals that are inside.
This is very confusing for the regular zoo goer inmagine the one day visitor how are they suppose to know what they are looking at or for.
There was a "Birdwatching Guide" in the aviary - basically a double sided laminated bit of paper that was out of date. I don't like inaccurate signage, but in fairness it's probably something small collections can't afford to spend much money or time on.