One of the Ig Nobel Prizes is the Prize for Bird Science.

(What is the meaning of the preposition 'for'? Is 'for' 'concerning' or 'about'?)

A prize is given for winning something ... in this case, in a category. The prize is for the best idea in that category.

"concerning" or "about" are good definitions. Here are more:
http://dictionary.reference.com/browse/for?s=t

The preposition "for" in the phrase "Prize for Bird Science" indicates the purpose or intended recipient of the prize. In this case, it means the prize is specifically designated for and related to the field of bird science.

To understand the meaning of a word or phrase, one effective way is to consult a reliable dictionary. You can use online dictionaries such as Merriam-Webster or Oxford English Dictionary to find its definition. These dictionaries usually provide multiple definitions and examples to help you grasp the various meanings and uses of the word in different contexts. Additionally, you can also refer to grammar guides or language learning resources for a more comprehensive understanding of prepositions and their usage in sentences.