# Supplemental File 1: The model file used in this study to run AR analyses. This file was generated from 4-fold degenerate sites using phyoFit.

TRAINING_LNL: -24856140.786019
BACKGROUND: 0.252890 0.273806 0.199163 0.274140
RATE_MAT:
  -0.957502    0.189770    0.641576    0.126155
   0.175274   -0.964770    0.240539    0.548957
   0.814652    0.330689   -1.354657    0.209316
   0.116376    0.548289    0.152068   -0.816733
TREE: ((((((((((((((((ZebraFinch:0.0475326,(MediumGroundFinch:0.0265565,WhiteThroatedSparrow:0.0447652)NA:0.0321774)NB:0.0149245,CollaredFlycatcher:0.0656417)NC:0.0106095,(AmericanCrow:0.0569206,TibetanGroundTit:0.0534288)ND:0.00256597)NE:0.0351483,Bowerbird:0.0615752)Oscines:0.0414417,(BlueCrownedManakin:0.0171307,GoldenCollaredManakin:0.0167139)Manakins:0.070782)SA:0.0241937,Rifleman:0.107032)SB:0.061521,((Kakapo:0.031001,Kea:0.0386544)NF:0.0122926,(ScarletMacaw:0.0424657,Budgerigar:0.0491079)NG:0.021396)Parrots:0.0506685)PM:0.0131324,PeregrineFalcon:0.0811094):0.00536878,RedLeggedSerima:0.0634225):0.00338858,(DownyWoodpecker:0.188401,GoldenEagle:0.0502134):0.00670204):0.00581681,(CrestedIbis:0.0502407,EmperorPenguin:0.0386261)IbPen:0.010156):0.00306116,(Killdeer:0.0666019,Hoatzin:0.0815579):0.00690131):0.00375323,(((AnnasHummingbird:0.116925,ChimneySwift:0.0936012):0.0353552,ChuckWillsWidow:0.0733312):0.00827578,CommonCuckoo:0.124002):0.00798602):0.00291214,(AmericanFlamingo:0.0474614,RockDove:0.118358):0.0063694):0.0350169,((Chicken:0.043051,GreaterPrairieChicken:0.0578805):0.0992156,Mallard:0.0973601):0.038153):0.0387798,(Ostrich:0.070508,WhiteThroatedTinamous:0.1612):0.0387798);