the Coloration of Eggs. 601 



tlie Grey Wagtail's \vas apparently fouud a little more 

 tempting than the others. 



Expt. 23. July. — The first part o£ the experiment was 

 again a test of addled eggs and eggs with mixed and exposed 

 yolks. Results as before. An interesting point was his 

 refusal of fowls' eggs (several offered), though he had eaten 

 badly in the night (fowl's intestines, which he never cares 

 for, had been given instead of his usual meat and left un- 

 touched) and was now hungry enough to attack even Pied 

 Wagtails', Wrens' and Great Tits' eggs, also ducks'. He 

 attacked a fowl's egg, in which yolk and white were mixed. 

 He also attacked a Turtle-Dove's egg (Turtur aiir, 



refused the Dove's, smelt and refused the same Pied 

 Wagtail's egg as before ; but, after smelling it, attacked a 

 Meadow-Pipit's egg ; smelt and refused the Pied Wagtail's, 

 but, on my continuing to press it on him finally licked into 

 it and, breaking the yolk, went on with it; smelt and refused 

 a second freshly opened Pied Wagtail's from the same 

 clutch, its yolk well protected by the white, but readily ate 

 a Meadow-Pipit's; smelt and refused thePied Wagtail's, and 

 this time a Meadow-Pipit's too, also a Garden-Warbler's and 

 the W^agtail's and Pipit's re-offered ; but, on smelling it, 

 readily attacked a Greenfinch's. I withdrew it before he 

 had finished it and re-offered the Wagtail's and Pipit's. He 

 smelt and refused each, but accepted readily and finished the 

 Greenfinch's. 



He smelt and refused a fowl's egg, then came forward 

 and smelt over the Duck's, a second Fowl's, the Dove's and 

 the addled Moorhen's (all of which had been lying just 

 before him all this time), and licked a little into the 

 last, but desisted ; smelt and refused the Pied Wagtail's, 

 licked and refused a Meadow-Pipit's, smelt and refused the 

 Garden- Warbler's, a Grey Wagtail's, and a Wren's ; licked 

 and refused one of the Meadow-Pipit's (of which the sides 

 were now broken away, showing the yolk right on the sur- 

 face, but still unbroken) ; and smelt and refused a cracked 



