HETEROCHROSIS IN ESSEX BIRDS AND THEIR EGGS. 191
Kittiwake Gull. Rissa t. tridactyla (L.).
Complete .. 1
Complete partial 0
Partial .. .. 0
Total .. 1
Ref.: British Birds (Mag.), vol. 15, p. 214.
Moor-Hen. Gallinula c. chloropus (L.).
Complete .. 1
Complete partial 0
Partial .. .. 1
Total .. 2
Ref.: The Birds of Essex (Christy) ; A History of the Birds of
Essex.
Coot. Fulica a. atra L.
Complete .. 0
Complete partial 1
Partial .. .. 1
Total .. 2
Ref.: Zoologist, 1892, p. 151; A History of the Birds of Essex.
Pheasant. Phasianus colchicus L.
Not infrequent.
Ref.: A History of the Birds of Essex.
Common Partridge. Perdix p. perdix (L.).
Complete .. 1
Complete partial 1
Partial .. .. 6
Total . . 8
Ref.: The Birds of Essex (Christy); The Field, vol. 34, p. 432, vol.
68, p. 518 ; The Essex Nat., vol. 22, p. 320, vol. 23, p. 32.