Os síntomas da gripe das aves são bastante fáceis de detectar.
Por exemplo, se um agricultor abrir a capoeira e vir um ou mais
frangos metidos na cama, de termómetro enfiado no bico,
e a comerem canjinha, é altura de ir buscar a caçadeiraRicardo Araújo Pereira
English version (courtesy of Google, I was too lazy to do it myself so I just reviewed the results):
The symptoms of the avian flu are quite easy to detect.
For example, if a farmer opens the bird shack
and to finds one or more chickens in the bed,
thermometer stuck in the beak and eating chicken soup,
is time to get the shot gun…
Disclaimer: this text is not to be taken seriously… 
internet