THE BIRD BOOK 
Derby Flycatcher 
448. Cassin’s Kingbird. 
T yr annus vocif erans. 
Range. — Western United 
States from the Rocky Moun- 
tain region to California, and 
from Wyoming southward. 
This species is like the last 
except that the throat and 
breast are darker. Their 
* , 
Buff 
habits, nesting habits and 
eggs are indistinguishable 
from those of the other Ty- 
rant Flycatchers, and they 
are fully as courageous in the 
defense of their homes 
against either man or bird, 
their notes resembling those 
of the common Kingbird of 
the east. 
449. Derby Flycatcher. Pitangus sulphuratus derbianus. 
Range.- Mexico and Central America, breeding north to southern Texas. 
This handsome bird is the largest of the Flycatcher family found in the 
United States, being 11 inches in length. It has a black crown enclosing a 
yellow crown patch ; a broad black stripe from the 
bill, through the eye and around the back of the 
head, is separated from the crown by a white fore- 
head and line over the eye; the throat is white 
shading into yellow on the underparts. They are 
abundant in the interior of Mexico, but can hardly 
be classed as common over our border, where they 
nest in limited numbers. Their nests are unlike 
those of any of our other Flycatchers being large 
masses of moss, weeds and grass, arched over on 
top and with the entrance on the side. The three or four eggs are creamy white,, 
sprinkled chiefly about the large end with small reddish brown or umber spots; 
size 1.15 x .85. 
