Table 1.

List of species and measured colour of iridescent speculum feathers (one measurement per species) in dabbling ducks (Anseriformes: Anatidae). Columns indicate peak location (hue), height (peak reflectance) and full width of main peak at half maximum (FWHM). Superscript letters next to species names indicate source of feather samples.

species	hue (nm)	peak reflectance (%)	FWHM (nm)
Anas platyrhynchosa	462	14.96	77
Amazonetta brasiliensisb	514	49.84	102
Anas carolinensisa	525	45.95	69
Anas clypeataa	551	10.67	87
Anas acutaa	600	15.15	93
Speculanas specularisb	642	61.83	84

^aUniversity of Akron, Akron, OH, USA.

^bUniversity of Michigan Museum of Zoology, Ann Arbor, MI, USA.