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bird given as “Iris rich brown. No yellow in bill; tip blackish, base 
more bluish, cere and gape greenish. Toes and tarsus pale yellowish 
grey — not strongly yellow.” At time this bird was shot two hunted 
together over lower slopes, but no evidence of this bird breeding. 
On July 14, by using same strategy, an adult nesting female with a 
whitish tail secured, and two days later plaintive voices of young calling 
“ Klee-eeV ’ often repeated in short spells, revealed whereabouts of nest. 
Two young taken July 19 and male next day, third being kept in camp 
for observation until August 11. 
Colour notes on adults given as follows: female: “Iris rich brown. 
Bill blackish at tip, bluish at base, cere yellowish green. Toes and tarsus 
pale yellowish grey.” Male: “Iris brown. Bill slaty at tip, running to 
blue, and base and cere greenish yellow; gapes mostly yellow. Toes 
and tarsus yellowish grey.” 
Colour notes on juveniles. “Male and female : Iris grey-brown. 
Bill bluish slate, cere and base greenish. Toes and tarsus faint pale 
green is i.” 
Weights of above birds: adult male 2\ pounds; adult female 3 pounds; 
juvenal male 2\ pounds; juvenal female 2\ pounds. 
Young not fat, though in good condition. Ears of both young taken 
July 19 crammed with brownish maggots — a dozen or fifteen in each ear. 
Young red-tails never before seen by writer to leave nest in such 
immature state, though this may have been partly due to fact that when 
they flew from nest (July 19) they had a long, down-hill slope to traverse. 
All were taken remote from nest. 
Red squirrels and rabbits formed main food of these hawks here. 
Both stomach contents and general habits agreed in this. Youngster 
kept in camp began with a capacity of about a red squirrel and a half a 
day, but on July 27 ate two red squirrels, and the skinned bodies of two jays 
and an olive-sided flycatcher. Disgorged large gobs of hair like an owl. 
This bird, like most young red-tails, proved quite intelligent and tractable 
in captivity — utterly unlike young goshawk. 
Almost a certainty that no red-tails nested in valley above camp, 
though they frequently hunted there. 
Another pair in which one bird was white-tailed, found a few miles 
down valley, but could not be secured. Again, August 21, as party 
returned, near McCarthy, an adult with white tail seen hunting with a 
brown juvenile. Latter killed with rifle and proved counterpart of other 
young taken. 
Specimens: 1, adult, female, July 14. 
2, adult, male, July 20. 
3, juvenile, male, July 19. 
4, juvenile, female, July 19. 
5, juvenile, male, August 11. 
Above represent a complete family, parents and offspring. Last juvenile kept in 
captivity for some time before being made into a specimen. 
6, juvenile, male, McCarthy, Alaska, August 21. 
7, adult, female, July 5. 
An important series. With those collected by Brooks and Swarth near Atlin, British 
Columbia, and a single adult and young taken by writer on Red Deer river, Alberta, all in 
same season as above, they constitute only substantiated record for breeding of Harlan’s 
hawk that he knows. As they form basis of a separate paper where they are fully described 
and illustrated, not necessary to elaborate upon details of their characters here and now. 
Male of mated pair can be described as a black B. b. calurus, female as a well-marked B. b. 
