Long eyelashes on an Amazon (male or female) is a quick visual of the recent/long term good health, quality of diet and more importantly - not dealing with stressed. After a quick over view of the physical appearance of an Amazon, a detailed look at his eyes and eyelashes will provide a quick snap shot. Long eyelashes are seen only on healthy, happy and stress free Amazons.
For me, the recent loss or long term loss of eyelashes demands a very close visual inspection of the Amazon including droppings. Health, diet or stress issues are likely present. If other signs are apparent consider changing the status of your Amazon to sick and treat as needed depending on what your findings are: Stress Reduction / Diet Change / Vet Visit.
Seeing another individuals Amazon that has no, very short, or very few eyelashes has me doing an automatic double check of the overall parrot. If I am seeing any sign of other issues, I will not make contact with that Amazon and if I do - its a full removal of my clothing and a full shower before I get deep into my home or make contact with my Amazon(s). Lived though that dark period of friends losing nearly, if not all of their parrots has me ever mindful of spreading one or more of the illness parrots can carry.
Love long eyelashes on Amazons.
NOTE: This applies to Amazons only!
Steven,