EASTERN NIGHTHAWK 223 



tipped, barred, and spotted with "viiiaceous-buff" ; some of the tips 

 approach "avellaneous." The feathers of the upper parts are dark, 

 or dusky, neutral gray variously mottled with shades of gray and 

 "avellaneous" many of the feathers tipped with "pinkish buff.'* 

 Auriculars "light cinnamon-buff" and black, tipped with lighter 

 shades. Primaries and secondaries blackish warm gray, some of the 

 feathers having an olivaceous-black appearance. All the remiges 

 are tipped with "tilleul buff" or "vinaceous-buff." Some of the 

 secondaries and inner primaries spotted with "vinaceous-buff." 

 Coverts of primaries unspotted "blackish mouse gray" or black. 

 Coverts of secondaries spotted with "tilleul buff" and "vinaceous- 

 buff." Lesser wing coverts variously mottled with colors mentioned 

 above. Feathers of the breast barred with "dark mouse gray" and 

 shades of gray and white. Throat and chin with a crescentic band 

 of feathers, which are barred with dark gray and white, the white 

 predominating. Band of feathers along the edge of mandible ex- 

 tending below the eyes to the auriculars "neutral gray" and marked 

 with "vinaceous-buff." Under tail coverts "cartridge buff," narrowly 

 barred with black. Middle of the belly a heavy mat of down. Eye- 

 lids "light olive-gray," tarsus deep metal gray. 



At 25 days the down has been lost, except that of the middle of 

 the belly and small patches on the legs above the heels. 



At 28 days the colorings are about as described for the 20-day-old 

 chick, but the colors are subdued and faded because of exposure to 

 the intense sunlight. The down is now entirely replaced by the 

 feathers of the juvenal plumage. Although the outer primaries are 

 only partially unsheathed, the young bird is capable of long flights 

 and frequently leaves the roof, but invariably returns. 



At 30 days the secondaries and the primaries, except the outer 

 ones, are now unsheathed. The barred feathers lining the wings 

 are now in process of unsheathing. 



At 35 days the prevailing color of the upper parts is olivaceous- 

 black, glossed with greenish, but this base color is very much broken 

 by irregular markings, spotting, and marbling of buffy gray and 

 whitish; many of the larger spots approach a light vinaceous-buff, 

 which is especially evident on the crown. Spots of the crown arc 

 larger than those of the back. The throat patch now is clear white, 

 an indication of its sex. 



At 40 days, all the primaries except the outer two are completely 

 unsheathed. The white patch of the second to fifth unsheathed, that 

 of the first is 11 millimeters. 



The bird, although able to fly as well as an adult, returned to the 

 roof each day and allowed me to make daily measurements and 

 weighings without the least resistance. It never attempted to run 



