I have read through races of the dragon and find something confusing. The mechanics of rebirth sidebar says:
"Upon transformation from her initial race to a dragonborn,
a supplicant loses many racial traits and gains those of the
dragonborn. The following information describes how to mechanically
achieve this transformation.
Type, Subtype, and Race: You retain your original type and
subtypes, gaining the dragonblood subtype. You still count as
a member of your original race for the purpose of any effect or
prerequisite that depends on race.
Racial Hit Dice: You retain your original racial Hit Dice, as well
as all benefits gained therefrom (base attack and save bonuses,
skill points, hit points, and so on).
Ability Modifiers: You retain your original racial ability modifiers
and gain the ability modifiers of the dragonborn race.
Size: You retain your original size. If the original race had
powerful build as a racial trait, it is also retained.
Speed: You retain your original base land speed, as well as any
other modes of movement possessed by your original race. Other
racial traits related to speed or movement, such as the dwarf’s
ability to move at full speed in medium or heavy armor, are lost.
Languages: You retain any languages you already know. You
gain Draconic as an automatic language.
Favored Class: You retain your original favored classes and
gain fighter as a favored class. You can multiclass into the paladin
class freely.
Level Adjustment: You retain your original level adjustment.
Other Racial Traits: You lose all other racial traits of your original
race, including bonus feats, skill bonuses, attack bonuses,
save bonuses, spell-like abilities, and so forth. Two specific
instances warrant clarification:
• If your original race granted you a nonspecific bonus feat (such
as the one gained by a human at 1st level), any feat can be lost,
so long as it is not a prerequisite for another feat you have.
• If your original race granted bonus skill points, you should
deduct an appropriate amount of skill points from your current
skill ranks. The specific skills affected are up to you,
but the DM’s input might be required to adjudicate tricky
situations (such as multiclass characters who might have
purchased ranks of various skills as both class skills and
cross-class skills).
The loss of racial traits might mean you no longer meet the
prerequisites for a prestige class, feat, or some other feature.
In general, you lose any special ability for which you no longer
qualify, and nothing is gained in its place. A couple of exceptions
exist.
• If you no longer qualify for a feat due to the transformation,
you lose the feat and immediately select a new feat for which
you qualify in its place. You must also replace any feat for
which the lost feat was a prerequisite.
• If you no longer qualify for a prestige class, you lose the benefit
of any class features or other special abilities granted by
the class. You retain Hit Dice gained from advancing in the
class, as well as any improvements to base attack bonus and
base save bonuses that the class provided. If you later meet
all the prerequisites for the class, you regain the benefits.
Special: Ordinarily, only a 1st-level character can select
certain feats requiring the dragonblood subtype (see Chapter
6). However, upon becoming a dragonborn, you can elect to
replace one (and only one) of your existing feats with one of
these feats. A character cannot have more than one of these
feats. The feat to be replaced cannot be a prerequisite for any
prestige class, ability, or other feat."
You will see the part I have made bold, yet later in the book there is description of a dwarf dragonborn and it has kept its racial bonus against poison and bullrushing within its statistics. I dont know which racial abilites an elf would lose and which to keep even more now?
[edit for spelling errors]
