If you have ever come across the term "pebbling" on social media, you may be familiar with the phenomenon of a male penguin trying to woo a female penguin by gifting her a perfectly smooth and shapely pebble. Surprisingly enough, however, penguins are not the only species of animal that likes to try and improve their romantic chances by showering potential mates with gifts. Furthermore, there are even some animals who like to treat fellow members of their species even where there is no ulterior motive.
Curious? Check out this gallery to find out more.