How many brands of cars have bird's wing as a logo?

not many, just these ones:
alta
arrinera
aston martin
bentley
bizzarrini
changan
chrysler
eterniti
haima
fpv
genesis
hillman
hispano-suiza
iso rivolta
isdera
jawa
lagonda
laraki
Maruti Suzuki
mazda
morgan
mini
pgo
rezvani
rossion
saab
soueast
skoda
ssangyong
uaz
vauxhall
wanderer
wuling

1) Ford Thunderbird
2) Pontiac Firebird
3) Aston-Martin
4) Bentley
5) Mazda
6) Hyundai Equus
7) Chrysler used a hawk

1. Chrysler
2. Ford
3. Pontiac ex. Firebired; Trans Am
4. Bentley
5. Moto Guzzi
6. Avions Voisin
7. Plymouth-Road-Runner
8. Studebaker
9. Jaguar
10. Packard
11. Oldsmobile
12. Aston Martin
13. Buick

33

And why is it (that more than one brand has the same discription of logo)a good thing, or a bad thing, whichever it is?