BNSF's locomotive roster has been a colorful
thing from Day One. For one thing, both major parent roads had a
variety of schemes prior to the merger. With such a massive
combined fleet, repainting was often limited to a simple addition of BNSF reporting marks on the cab.
After the merger, BNSF
experimented with several paint designs, which continue to evolve
(currently the standard is the New Image "wedge" scheme).
These included a barely-modified red/silver Warbonnet, a green Warbonnet
(only 1 unit), the barely-modified "corporate" green/cream scheme, the
first "heritage" scheme of orange/green (H1), the modified heritage
scheme (H2) with the cigar-band stripes and yellow herald, and the New Image or "wedge"
scheme (in two variants).
Locomotive models are representative of the efforts of both major
builders, including some of the rarer types; GP60B's come to mind.
As time has passed, the GE C44-9W and its newer cousin the ES4400DC
have become dominant, but most older models are still commonplace.
Most pre-merger units have been renumbered; some simply had a new digit
prefixed to their existing number. However, a few (e.g. the Santa
Fe Dash-9's and some of the BNSF SD40-2's) have kept their original
numbers. Refer to the roster links at left for more information.
UPDATE 9/20/2010: Massive amount of new units have been
added to the GE Page, courtesy of my trips to the Gallup area (see link