Help with Birds in GMOD, How do they fly?

Ok so i am making a movie and need my bird npcs to fly , that include all the birds.
People tell me i need air nodes , but is there a special npc pack i can download to make the birds fly?
they don’t need to fly anywhere special , i just need to record them flying.

Thanks in advance for the help.

[editline]12th March 2011[/editline]

Please forgive me if i have posted in the wrong forum area , i haven’t used facepunch for years!! sorry!! > <

I think you’d have to ask that in the mapping section.

okay , my apologies

I believe there’s a “bird pill” SWEP somewhere. If you could go into a multiplayer game and have another player use it that might work’.