Рет қаралды 76,035
House Finch and Cow Bird chicks compete for food delivered alternately by Eastern Phoebe and House Finches. Cow Birds do not normally survive when hatched in House Finch nest but this one thrived. This video challenges the traditional diet incompatibility explanation. It appears to be more a matter of finches favoring their own. Yep, I know it is Eastern and not Northern but not worth a another download.