The most likely meaning is that the cardinal mistook the (glass) doorway for an opening, and died when it collided with the door.
A dead frog on your doorstep means that a cat loves you, is grateful for your kindness (food etc.) and is leaving you a gift.
That your cat would like you to cook it
It means your going to DIE
A step farther
A dragonfly is said to represent joy, adaptability, and a connection with other realms. A dead dragonfly at a front door does not signify anything.
Cardinal is the next step down in the hierarchy from the pope.
you open the door and step out
It means that the dead should be left alone to rest.
It's actually called a doorstep. The definition for "doorstep" is: a step leading to the door. Hope this helps.
Not all naturally occurring phenomenon are "signs". Often small creatures such as birds fly into buildings, are the victims of predatory animals (cats & dogs regularly leave "presents" for their humans), or are just victims of mischance. Unless this bird is of spiritual significance to you personally (as in a long standing totem or helper animal) I would not consider it to be of any importance in your life.
Alright here is how to get into your truck with a dead fob: Step 1: pull the hidden key out of the fob, but pressing on the thin line underneath the "open trunk" button. You will have to press the thin line and pull the metal end of the key. Step 2: Insert the key into the door and turn it. This will open the door. Step 3: Manually unlock the rear door, so you have easy access to the rear seat. Preferably the driver's side. Step 4: Pull the little cloth hinge which pulls your seat down, so you access to your truck. Step 5: Pull the yellow/green lever at the top center of the truck and your truck with pop open!!!
Step 1: Get a sledge hammer. Step 2: Get the spare bulb. Step 3: Pound the crap out of both the new bulb and your door.