SUPPLEMENT TO BIRDS OF ESSEX COUNTY 1 77 



323 [755] Hylocichla mustelina (Gmel.). 

 Wood Thrush. 

 Common summer resident. May 4 to September 16; average date of arrival 

 for sixteen years, May 10. 



Eggs: May 25 to June 15. 



324 [756] Hylocichla fuscescens fuscescens (Staph.). 



Veery; Wilson's Thrush. 

 Abundant summer resident. May i to October 6. 

 Eggs: May 20 to June 30. 



325 [757] Hylocichla alicias aliciae (Baird). 



Gray-cheeked Thrush. 



Common transient visitor. May 10 to May 30 (June 18) ; September 10 to 

 October 5. 



326 [7S7a] Hylocichla aliciae bicknelli Ridgw. 



Bicknell's Thrush. 



Not uncommon transient visitor. May ; September 18 to October. 



The relative abundance of this and the Gray-cheeked Thrush cannot be deter- 

 mined without the gun, as the two cannot be distinguished with certainty except 

 by measurements. 



327 [7S8a] Hylocichla ustulata swainsoni (Tschudi). 



Olive-backed Thrush. 

 Common transient visitor. May 7 to June ; September 10 to October 6. 



328 [759b] Hylocichla guttata pallasi (Cab.). 



Hermit Thrush. 



Very common transient visitor; not uncommon summer resident locally. 

 April 4 to June i (summer) ; October 4 to November 24 (winter). 



Eggs: May 30 to June 14. 



