"Ducks" is a descriptor in the National Library of Medicine's controlled vocabulary thesaurus, MeSH (Medical Subject Headings). Descriptors are arranged in a hierarchical structure, which enables searching at various levels of specificity.
MeSH information
A water bird in the order Anseriformes (subfamily Anatinae (true ducks)) with a broad blunt bill, short legs, webbed feet, and a waddling gait.

This graph shows the total number of publications written about "Ducks" by people in this website by year, and whether "Ducks" was a major or minor topic of these publications.
Bar chart showing 2136 publications over 30 distinct years, with a maximum of 177 publications in 2018
To see the data from this visualization as text, click here.