TWEEDLEDUM AND TWEEDLEDEE
“Tweedledum and Tweedledee”….
…are the identical twins from “Through the Looking Glass” by Lewis Carrol, describing the further adventures of Alice in wonderland. The two European species of treecreeper (Certhia) often remind me of those fictional characters from my childhood. The Eurasian and Short-toed Treecreepers look almost identical but happily co-habit, and are hard to tell apart until you hear them sing, then things become easier. I hope this article helps those folks who are as confused as I was when I first encountered them both together.
