How to use it
The dataset loads automatically once you close this panel, so choose
which life-history trait to compare against body mass in
Compare body mass against. Each dot is a species,
plotted on a log mass scale; the shaded band and line trace the
median and interquartile range across the dataset.
Drag across the chart to brush a mass range and
list the species in it. Hovering a dot shows its name — to find a
specific species, type its common or scientific name into the
search box beside the chart; picking a match
highlights its dot with a ring and opens a detail card below the
search box with its mass, chosen trait value, and conservation
status. Click a dot, or the photo/name in its detail card, to open
the full species profile. Switch Color by to
highlight conservation status.
About this data
The species data on this page comes from
BIRDBASE, a peer-reviewed global dataset of avian
biogeography, conservation, ecology, and life-history traits —
78 traits for 11,589 species across 254 families, synthesized from
367 published sources spanning 1957–2025.
Şekercioğlu, Ç.H., Kittelberger, K.D., Mota, F.M.M. et al.
BIRDBASE: A Global Dataset of Avian Biogeography, Conservation,
Ecology and Life History Traits. Scientific Data (2025).
This page is a downstream retelling of that dataset, not a
replacement for the source — see the full
paper on nature.com
for methodology, sources, and citation details.
