What is the symbolism of a “yellow bird?

I am a Bright Eyes fan and “yellow bird” comes up in two of his songs, but I’m not exactly sure what it means.

I’ve always wondered that myself, and I’m not completely sure if my hypothesis is correct but here it goes…
There is a song by Simon Joyner called “Along Came a Yellow Bird,” in which the yellow bird symbolizes hope and, essentially, life. If you listen to the “We Are Nowhere and It’s Now” and “Poison Oak,” you may notice that both songs suggest the need and want of security (found in the yellow bird).
I’m not sure if there is any definite connection between Joyner’s late 90s song and Conor’s music, or if it is just understood that a yellow bird symbolizes the virtues of life. However, I think Joyner’s line, “Every time you wish to die an arrow was released, and the only thing between dark and light was my breast or yellow wings,” and Conor’s lyrics, “She says these bars are filled with things that kill and you probably should have learned. Did you forget that yellow bird? How could you forget that yellow bird?” compliment each other very well…
Anyway, I suggest listening to both artists and making your own deduction.

The Mills Brothers “Yellow Bird”

Kikkerland Owl Kitchen Timers, Assorted Colors $9.29 KT39-A Features: -Material: plastic and steel. Color/Finish: -Variety of possible colors.-Color based upon availability….

Alessi Replacement Bird Whistle for 9093 Michael Graves Kettle $10.99 One replacement bird whistle for ALESSI Michael Graves kettle item # 9093 NOT suitable for other kettles e.g. Target brand…

Bunzlauer Polish Pottery Traditional Pie Plate, Blue with Yellow and Green $32.75 Blue w/Yellow Swirls…

Rare Bird Alert $10.54 All products are BRAND NEW and factory sealed. Fast shipping and 100% Satisfaction Guaranteed….

Encore (Deluxe Edition) $8.65 Eminem’s fourth album offers few surprises, but still enough pleasures to carry the day. As evinced by Em’s pre-election, pro-voting “Mosh,” this is not exactly the same Eminem who seemingly crapped on anything and everything. Encore finds a surprisingly mature Eminem waxing reflective about his battle with Benzino (“Like Toy Soldiers”) rather than unloading both barrels. However, it’s not all eld…

Thomaspaul Yellow Bird Flat-weave New Zealand Wool Rug (5′ x 7’6′) $0 Flat-weave Yellow Bird New Zealand Wool Rug (5′ x 7’6′)

Thomaspaul Yellow Bird Flat-weave New Zealand Wool Rug (7’9 x 10’6) $0 Flat-weave Yellow Bird New Zealand Wool Rug (7’9 x 10’6)

Yellow Bird And Me $6.88 Doris becomes friends with Yellow Bird as she helps him with his studies and his part in the school play and discovers that he has a problem known as dyslexia.

Yellow Bird $19.99 Yellow Bird – Premium Poster