Table 1. Comparison of plumage characters of the putative hybrid specimen with specimens of adult eastern and western Red-shouldered Hawks and western Red-tailed Hawks.

Character	WFB 4816	Adult East & West RS’s	Adult West RT’s	Figure no.
Malar & throat	Uniformly dark	Darker malars; paler throat, often with dark streaks	Dark or dark with pale streaks	1
Belly barring	Dark brown, with short dark streaks	Rufous	Dark brown with short dark streaks	1
Uppersides of remiges	Gray barring, no white on primaries	Gray barring with white spots across primaries	Dark brown. No white on primaries	3
Remige tips	Narrow gray tips	Wide white tips	Dark tips	3
Lesser upper wing coverts	Dark brown with no rufous	Show rufous ‘shoulders’	Dark brown	3
Upper tail coverts	Dark brown with rufous and white barring	Dark brown with white barring only	Rufous with dark brown barring	3
No. of tail bands	6 (or 7)	4 or fewer (five had 5 bands)	No pale bands	2
Tail band color	White with rufous tint	White only, no rufous	No pale bands	2