Was Crocodile stronger at Marineford? Or was he holding back in Alabasta?

 During the Alabasta arc, Crocodile displayed a level of power that was initially considered overwhelming by the Straw Hat Pirates. He possessed the Logia-type Devil Fruit called the Suna Suna no Mi (Sand-Sand Fruit), which granted him the ability to control and transform into sand. He had a reputation as a Shichibukai and controlled the desert kingdom of Alabasta from the shadows. His strength was showcased through his battles with Luffy and others. At Marineford, Crocodile was present as part of the war that took place at Marine Headquarters. While he did participate in the battle, he didn't display the same level of dominance as some other powerful characters present. This has led fans to speculate that he might not have been as strong as initially portrayed in Alabasta. It's important to note that power scaling and character abilities can be subject to interpretation and development by the author. Oda often keeps details deliberately open-ended to keep the story intriguing.

What is the significance of finding bird feathers? Do they have any meaning or purpose?

 Bird feathers are important for a variety of reasons, both to birds and to humans. In birds, feathers serve several important functions, including insulation, flight, and courtship.

For humans, bird feathers can have cultural, aesthetic, and scientific significance. In many cultures, bird feathers are used in traditional clothing, jewelry, and other decorative objects. They are also used in some spiritual and religious practices, such as Native American smudging ceremonies.

In addition to their cultural significance, bird feathers are also of scientific interest. Bird feathers are often used to study the evolution and behavior of birds, as they can provide valuable insights into the biology and ecology of different species.

Overall, bird feathers have a variety of meanings and purposes, both to birds and to humans. They are important for their functional and aesthetic roles in nature and culture, as well as for their scientific value.