I have a plot for a novel. An armada of alien space ships is heading to Earth. They were traveling at a great speed but are now braking as they enter the solar system. It will take them months (or maybe years) before they reach Earth orbit. Up until now, they have not been able to intercept our TV and radio broadcasts. and even now they are struggling with a translation (hindered because they think that we all speak the same language). But they have sent a message to us. We have not translated it yet except we believe their intentions are peaceful and that they are friendly. However, the transmission includes images of the aliens. there are many different species. Some look like cows, some look a little like pigs, and then there is one that appears to be a large chicken.