Chickens Are Used as Detectors
Mosquitoes often spread Zika and West Nile viruses, and while chickens are immune to these pathogens, they do still show up in their blood after routine lab work. So, if a test detects the presence of a dangerous virus in chickens in the area, the staff will know which area of the park needs more mosquito repellent to keep their human guests safe. And these chicken tests aren’t the only way Disney monitors their mosquito situation.