| No. of birds with detected ophthalmological abnormalitiesa,b |
No. of birds with presumed mild or severe visual impairmentb |
No. of birds with presumed reduced visual acuity (evaluated by behavior) |
| Mild (birds with pigment/drusenoidcchanges mainly) |
severe (birds with a considerable area of neurodegenerationd) |
| 16
red kite (1)
common buzzard (2)
kestrel (2)
peregrine falcon (2)
mute swan hooded crow carrion crow tawny owl
long-eared owl (3)
barn owl common swift |
11
red kite (1)
kestrel (2) peregrine falcon (2)
mute swan
hooded crow
tawny owl
long-eared owl (2)
common swift |
5
common buzzard (2) carrion crow
long-eared owl
barn owl |
1
carrion crow |
| athe term ‘detected abnormalities’ indicates any alteration from the normal retinal structure present (e.g. pigment alterations, drusenoid changes, retinal degeneration, retinal detachment, RPE-detachment, or choroidal changes)
bnumber in brackets represents the number of birds
cadrusen-like appearance was termed “drusenoid” as a collective term throughout
dstructural, morphological and biochemical changes were part of a process termed retinal neurodegeneration as a collective term. |
