THE BIRDS OF NEW JERSEY. 291 



685 Wilsonia pusilla (Wilson). 

 Wilson's Warbler. 



Adults. Length, 5. Wing, 2.25. Above, olive-green, with a square, glossy, 

 black crown patch ; forehead, sides of face and entire under surface, yellow. 



You ni/ in first autumn. Similar, but black cap veiled with olive in the male 

 and usually lacking entirely in the female. 



A regular but not common transient visitant. Spring, May 12th 

 to 20th; autumn, August 20th to September 15th. 



One of the later Warblers of the spring flight. Its song bears some 

 resemblance, to that of the Yellow Warbler. 



686 Wilsonia canadensis (Linnaeus). 

 Canada Warbler. 



Adult male. Length, 5-5.75. Wing, 2.60. Above, including sides of head, 

 plain gray ; feathers of the forehead and crown more or less centered with 

 black ; below, canary-yellow, with a necklace of black spots ; a yellow line 

 over the eye ; spot in front and below the eye, black ; under tail-coverts, white. 



Adult female. Similar, but duller ; the spots of the "necklace" are dull gray. 



young in first autumn. Similar to adult female. 



Nest in a hollow on a bank among leaves and moss ; eggs, four to five, white, 

 with fine rufous spots, .65 x .50. 



Common transient visitant. Spring, May 5th (May 12th) to May 

 30th: autumn, August 20th to October 1st. Also found by Mr. S. 

 N. Rhoads to be a summer resident about the lakes of northern Sussex 

 and Passaic counties, June 4th to 8th, 1909. 



This is one of the later group of migrant Warblers, resembling 

 somewhat the Magnolia on the under side but with the necklace spots 

 smaller and no white on the tail. 



The song is represented by Professor Jones as "tu tu tswee tu tu," 

 the long middle note being pitched higher than the others. 



687 Setophaga ruticilla (Linnaeus). 

 Redstart. 



PLATE 75. 



Adult male. Length, 4.75-5.75. Wing, 2.50. Upper surface, as well as 

 entire head, neck and chest, glossy black ; a broad band across the middle of 

 the wing involving all but the tertials, bright orange or salmon, with faint 



