Did you know some species of hummingbirds have pointed beaks to fence with other birds?

https://news.berkeley.edu/2019/01/02/feisty-hummingbirds-prioritize-fencing-over-feeding/   This is fascinating research about how some hummingbirds beaks are more pointed which they use to fence with other birds. Some even have back pointing teeth. Other species can only feed on a few flowers, while others can feed off of many flowers in the garden