Interactive morphology tool
Build a Bird
Choose a realistic range for each measurement. BirdSize searches its measured catalog and finds real species whose morphology falls closest to the ranges you designed.
Your bird
Choose measurement ranges
Drag both handles to define the minimum and maximum. Results update automatically.
A bird scores best when its available measurements fall inside your selected ranges. Very broad ranges receive a small specificity penalty, so narrowing the ranges improves the quality of the match.
Closest real species
Birds that fit your ranges
Searching the BirdSize catalog…
What the match means
A morphology match, not a species identification
Build a Bird compares your selected measurement ranges with recorded bird measurements. A high match means the measured proportions fit your ranges well; it does not identify an unknown bird from measurements alone.