Usually only microbes, specifically bacteria are used to express genes of other species for various functions. But, it is possible to try and express an animal gene into a plant. Bacteria like Bacillus thuringiensis is used in many plants like cotton, to modify them to BT cotton with insecticidal properties. Can one use an animal gene to get those characteristics in the plant?
A few years ago plant scientists introduced a protein (afa3)in tomato from Winter Flounder, a type of fish surviving freezing conditions. The idea was to make a frost resistant tomato but I believe they did not have much success. Anti-GMO activists had a field day however with baseless claims of making tomato's smell like fish and other nonesense.
One example that I am aware of where an animal transgene was put into a plant was to produce the ZMapp, a chimeric, monoclonal antibody against the Ebola virus.
This is a wikipedia article on ZMapp, that gives you an idea of the process.
Other than this, I am not all that familiar with plant transgenics, other than Round Up resistance genes that were transfected from soil bacteria that developed a resistance to the active chemical in Round Up.
Hopefully other answers can provide you with more details, but these are the two examples that I know off the top of my head.