You will find general information in the upper section of the species pages. Most of this information has been taken from the standard reference work written by R.März, but also from the "Handbook" and other reachable sources.
Below this section, you will find pages from my feather collection and a corresponding description next to them. Wherever possible, I display the different plumage types.
The feather types are listed in the sequence from left to right and and from top to bottom.
The length dimensions refer to the feathers next to them and can thus serve as a scale.
You can display the feather images in the overview with a higher resolution by clicking them. (Attention: This requires a longer loading time.)
A centimeter measurement bar has been superimposed in the larger images.
Finally, I also specify the so-called Kipp'schen Handflügelindex (KHI) (as a percentage). This index is calculated as the ratio of the distance of the No. 1 secondary to the wing tip (x 100) to the total wing length. This index serves as a flight biological measurement parameter and gives an indication of a bird’s flight capability. It can be helpful in identifying birds found dead.