Abstract: In this paper, fiber spectrophotometer was first used in China to quantitatively analyze the egg color of Grey Bushchat (Saxicola ferrea) and Chinese Babax (Babax lanceolatus). The spectral measurement within the range of 300〖KG-*2〗-〖KG-*7〗700 nm showed that the egg color of the two bird species had significant differences in brightness and in green, yellow, and red chroma, but less difference in blue chroma. The spectral reflection ratios of visible light were of approximately parallel for the two bird species, with the same peak and foot, while those of ultra-violet were changing from high to low in differences. Principal component analysis of spectral reflection and shape indicated that the first three components together explained 999% and 998% of variation in the spectra of egg color of S. ferrea and B. lanceolatus, respectively. The first principal component (PC1) representing egg brightness explained 937% and 893% of variation, while the second principal component (PC2) representing egg chromatic variation accounted for 55% and 9.1% of the total variance, respectively. Using fiber spectrophotometer to quantitatively analyze bird egg color could provide more objective and scientific data for the study of bird classification, phylogenic evolution, and behavioral ecology, and develop new research area and angel of view.

Key words: Hairtail, Small-scale fish, Spatial heterogeneity, Semivariogram