Imposter

When my better half first starting showing an interest in hawk counting during our travels he would often mistake a sitting crow to be a sitting Red-tailed Hawk. He quickly dubbed crows as "imposters". He's now very familiar with the differences in the profiles of the two birds but still calls the crows by their new given name. Of course, this does come from the man who refers to squirrels as "rats with good P.R.".