Russet Sparrows spot alien chicks from their nests

Table 1 Outcome of experimental parasitism in Russet Sparrows

Parasite model egg	Accepted	Ejected	Total
Blue model egg	11 (100.0)	0	11
Blue model coin	5 (27.8)	13	18
Blue model stick	6 (50.0)	6	12
Real alien egg^a	10 (100.0)	0	10

^aReal eggs of 10 alien species from cross-fostering experiment. Numbers in brackets refer to the percentage of acceptance (%)

ISSN: 2053-7166