Table 1. Change in feather lengths as a result of their extension into the halo.

Measurements are taken along the curvature of the feather as far as possible. Only in some cases (marked with a *) can the feather be seen to reach the bone and thus its length measured. Other measurements are taken on the assumption that they do penetrate the halo and reach the bone (see text for details).

Feather type	Location	Apparent length (mm)	Full length (mm)
Plumulaceous	Back of the head	17	38
Plumulaceous	Base of the throat	8	23
Plumulaceous	Base of the spine	45	56
Plumulaceous	Chest (furcula)	14	23*
Plumulaceous	Proximal tail	13	24
Pennaceous	Distal right wing	105	113
Pennaceous	Middle of right wing	75	104
Pennaceous	Metatarsals (mid length)	105	113*
Pennaceous	Metatarsals (longest feather)	138	149