How do you know what a care package contains in Modern Warfare 2?

Question

According to the Call of Duty wiki:

If a UAV or Counter-UAV is dropped, leave it for a teammate as this will award the "Share Package" XP bonus while having the exact same effect, as UAVs and Counter-UAVs apply to the whole team.

How do you know what the air-drop contains without taking it?

Answer 1

To expand on what Arda Xi said once the package lands it should show an arrow with an image inside. Here are most of the images that could show up in a care package:

It isn't included in the list below but another possible drop is an ammo resupply crate.

1. when this shows up the care package contains has a UAV

2. when this one shows up it is a counter UAV

3. this means the package contains a sentry gun

4. this is a predator missile in a box

5. this is a precision air strike

6. harrier strike anyone? (I'm not sure this is the right picture...)
7. attack helicopter is contained within
8. a pavelow
9. stealth bomber...
10. Chopper gunner (Better pick this one up)
11. Ac-130 controls in this box
12. EMP strike waiting in the box

Those are all the possibilities for a care package. All of this information and all of these pictures were gotten from the Call of Duty Wikia