I know that my (now dead) dog would try to lie and trick me. (He was a good dog though). He'd always look ashamed when he was doing it.
You don't have to define lying as conscious lying. A lot of lying is done unconsciously by humans in the form of instrumental speech. I.e. people say things to achieve instrumental goals without even bothering to consciously reflect of if they're telling the truth or not. They are just invoking a behavioral pattern they have learned. Oftentimes a store clerk will wish you a nice day as you leave. They probably didn't think about whether they honestly wanted you to have a nice day or not. They're just saying those words as a behavioral habit. In fact, they may have absolutely no interest in you having a nice day, in which case it's a lie. But they didn't THINK about whether their lie was true or not before saying it, so they did it unconsciously. This is basically how animals communicate, imo. They use instrumental expressions to pursue their interests/desire/will. They learn behavioral patterns that are likely to maximize their success. They are not concerned with honesty because they don't have a conscience, imo, only fear of being punished for doing things wrong and hope of being rewarded for good behavior. This doesn't mean that they can't be very clever in their behaviorism and instinctively learn ways of manipulating you in your conscience by studying the rewards and dangers that are in it for them. I.e. they can learn patterns in your behavior and manipulate you to their advantage.
Is it self-recognition or just making a cognitive connection between the image in the mirror and corresponding objects that are being reflected? The chimp may not actually identify with its image or even its own body. It may have a total object-orientation and no sense of personal "self" is involved.In reference too self-awaerness, I once read in "Science Magazine" that monkeys always confuse their own reflection in the mirror with another monkey. They growl at their own image, try to attack it, and display all kinds of self-defensive behavior at what they consider another monkey. In contrast, the chimp will realize that it's himself it is observing and begins opening its mouth to examine its own teeth and otherwise showing self recognition.
I don't think honesty can be applied to animals, since honesty requires free will.
Is it self-recognition or just making a cognitive connection between the image in the mirror and corresponding objects that are being reflected? The chimp may not actually identify with its image or even its own body. It may have a total object-orientation and no sense of personal "self" is involved.