BBC: The tropical mockingbird’s elaborate tune puts the brown trembler mockingbird to shame Unpredictable weather seems to stimulate chatter among birds – as well as humans – according to researchers. A team of US scientists has found that mockingbirds living in variable climates sing more elaborate songs. Complex tunes, sung by males to impress females, are likely to signal the birds’ intelligence. Published in Current Biology, the findings suggest that females seek …