Nobody knows how hard it is to get the attention of the ladies like the Superb Bird-of-Paradise (AKA the Smiley Bird of Paradise for the obvious reason you shall soon see). The New Guinea species has an unusually low population of females, so male birds have developed a peculiar dance to grab the attention of potential mates.
How peculiar? Let's just say it involves a giant smiley face:
Add that to the long list of strange animal mating habits we've featured on this blog. More at 10 Wild Ways for Animals to Woo a Mate - Thanks Dave!