@Batto Totally agree, and I also think it is incredibly lazy too to just use a picture of a common marmoset from google images (the Santarem marmoset isn't even a Callithrix species for gods sake), couldn't they have just taken a picture of their Santarem marmosets and used it for the signage ?
@Onychorhynchus coronatus In Austria and Germany, we usually jokingly assume that signs like this have been produced by a naive trainee on his / her first day at work...