Thanks for the kind words Harry. The maple I used on my Pegasus came from the former Hobbymill supplier. I believe he referred to it as "hard maple" but I could be wrong. I wanted a light colored deck, but didn't want something too stark white like holly and maple fit the bill.
The "tanganyika" (whatever it might be) is actually a really nice wood, at least the wood that was in my Caldercraft Badger kit. It works well, and really comes to life when you finish it with wipe-on poly or oil it with tung oil or the like. You won't go wrong with it.
I think Jaager is right about "walnut" - here is a picture from my Pegasus kit of the various "walnut" pieces. It's possible they are all walnut (or at least the same species), but my guess is that with the huge variation in color, they might have been different species. Unfortunately, that forced me to look to replace the kit wood so that the unpainted wood sections looked more consistent.
I'm a big fan of the Amati Keel Klamper and the Hobbyzone Professional building slip. You can probably build something similar to the slip (I did using MDF board and angle brackets) as well.
Landlubber Mike's post in Wood Color Comparison Chart was marked as the answer