I opened up a Bash window, typed in some commands, and this is what outputted:

aiden@jasonsmacstudio weather_images % ls
clear.png       cloudrain.png       cloudy.png      fog.png         heavy_rain-512.paidenaidaideaidaiaidaidaidaiaaaiaaaaaaiaiaaiaaiaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaidaidaiaiaiaaaaaiaaaaaaaaaaaaaiaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaidaiden@aiden@aidenaidaiaidaaiaaaaaaaaaaaaaidaidaidaidaidaiaiaaaaaaiaaiaiaiaaiaaaaiaaaaaaaaaaaaaaaaidaiaiden@jasonsmacstudio weather_images % scp -r *.png aiden@(private info):~/Desktop/AQI_project/weather_images/.
aiden@(private info)'s password: 

What is wrong with the file extension?