He yelled a time or two, though, on the off chance that it might be a human visitor.

He kept his eyes on the human visitors and didn't answer the animal.

I just told them to continue their duties, and to keep an eye out for the human visitors while they did.

You two are the first human visitors I have ever had.

That is also when most of the park's 800,000 annual human visitors come to the beach.

Sometimes you can also find him in the gardens and parks where human visitors, who would leave food.

So, she decided, animals in the zoo watch their human visitors.

Any color perceived by human visitors for a few hours in entirely different to what is really happening.

I hear they can be very friendly with human visitors.

Perhaps they no longer had any reason to expect human visitors.