Spiribird
These little nectar-loving birds provide a wide variety of bonuses, such as maximum life, defense, attack, or stamina. They come to you by themselves and give you this bonus by passing by with your Petalace. Some of these birds are on the path, but they also tend to congregate on peaks or in hard-to-reach places. Exploring the map well and remembering where they are will be useful before a difficult fight.
There is also a special rainbow colored version, which offers all 4 bonuses at the same time. An interesting detail is that the bonuses granted have no time limit. You can benefit from them during the whole hunt or until your hunter passes out. It is therefore a good idea to walk around the area to fill up on bonuses before starting the fight.