Koalas have invaded San Antonio.
Or to be more accurate, two male Phascolarctos cinereus have been loaned from the San Diego Zoo to the San Antonio Zoo for the duration of the Summer. As a father of two small girls who adore cute animals, this is big news. We made a point of seeing the koalas the first weekend they were out on display.
There was only one small issue: it was quite difficult to actually see the koalas.
The issue isn’t that the furry little marsupials like to hide or that they are particularly well camouflaged. The issue is the glass - it was far too reflective to see through it to the koalas inside.
Glass has many characteristics that can be individually specified. Different coatings and chemical formulations can give glass different levels of light transmittance and reflectance. Although we think of glass as being a transparent material, it also reflects a certain amount of the visible light that comes into contact with its surface.
It would seem that if you are designing an enclosure for koalas you’d want to keep the glass as transparent as possible so small children could behold the overt cuteness of the arboreal herbivores contained inside. There may be other factors at play that require the mirrored glass, but as experienced at the zoo the chosen glass appears to be a mistake. There are many situations where reflective glass would be a good idea, but unless I’m missing something, this does not appear to be one of them.