Birding Shanghai in April 2023
10,000 Birds
MAY 1, 2023
In Alaska, they were found to mimic 30 different species ( source ). Apparently , the two main factors influencing double brooding are the individual quality of the breeder and the timing of the first clutch. Red-flanked Bluetails make shorter stopovers during spring migration (average 1.7 days) than in autumn average 3.4
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