Birds represent messengers. The type of bird seen in a dream is directly symbolic of the type of message and spirit that is delivering the message.
I dreamed I caught a nasty little sparrow last night as it was in flight. I grabbed it out of the air with my left hand then moved it to my right hand. A man watching said "that's amazing."
And I said "I caught that nasty little sucker."
The sparrow while small and sometimes cute is a nasty little messenger that means no good in the spirit world. It carries mites and bird parasites. It makes its home anywhere it can bringing its troublesome little friends with it.
You can read an example of the sparrow on example's page 8.
A single sparrow can move into a martin house and all the Martin's will move out of that house. A sparrow will build upon another birds nest and completely transform it into something unusable by any other bird. The spirit that is associated with the symbol does the very same thing to people. When it moves in it does not like to share space with good spirits therefore it must drive them away by any means necessary. This isn't done by intention it is done by the nature of the spirit. The sparrow doesn't stop to think that it's parasites will drive the good birds away from it's nest, it just does what it does and the parasites do the rest.
A car, motorcycle or personal sized boat or even a small airplane can represent a person's body or their life. Generally the dreamer will see things he's familiar with. A person who's never sat at the controls of an airplane will most likely not dream of flying an airplane. Ordinarily people dream about things they have some experience with. The exceptions to this rule will include the possibility the dream is not a personal dream, but may be a viewpoint dream experience or a night vision.
Beasts of Burden
Another very common dream symbol is the symbol of the horse. The horse is a multifaceted symbol. This means it has more than one meaning depending on what part of the horse you see. The general meaning of the horse as a symbol is "power." From the very beginning the horse has been a beast of burden used by people for various load bearing tasks. Today we still use the term "Horse Power" and give it meaning by saying things like "235 HP." That HP stands for horse power.
The horse's mouth is a term that makes reference to the fact that looking into the horse's mouth is to know the truth about the horse. A person buying a horse who knows anything about horses knows the approximate age and condition of the horse by looking at the horse's teeth. If they are badly worn the horse is not young. If they are in good shape odds are good the horse is younger. Then the people may haggle over a price. A person buying a horse who doesn't look into the horse's mouth is not a wise person and may over-pay for the animal.
The horse's back. Seeing the horse carrying something refers to the load bearing message of the dream symbol. What does the horse carry? In the Bible we read of the four horses of the Apocalypse. We also read they carry the four horsemen of the Apocalypse. This is the load the horses carry. You will notice how the Bible names each of the riders according to their purpose. And the pale horse's rider is "death." Now death is seated upon a pale horse. The meaning of the symbol is simple. Death rides a pale horse. Death is the intention and purpose and the horse is the method by which death travels.
The horse's rear end is frequently a message about someone. We use the term "Horse's ass" for a reason. It means someone who's hard to deal with or someone who's being stupid.
The horse's feet are also a symbol that have meaning but usually the feet are mixed with other symbols and can have certain variations. The feet of the horse would generally refer to the ability to carry a message just as the feet of the prophets were directly related to the ability to carry God's message to the people. My foot prints on the Internet are these pages which you read. This page represents one foot print.