Oldjackssparrows wrote in post #17062336
Both Janet and Evan are correct but Evans remark of seeing both of those Finches with no color variation would be quite rare I would think and the exception far greater than the rule. For almost all cases the Purple Finch is vastly different. The Raspberry color Janet mentioned versus the red of the House finch is very easy to see. I go with the brown stripes on the House Finches chest and lower body as an easy to see difference. This one here sure does have a large amount of red much more than many but if you look low you can see the brown stripes of a male House Finch, IMHO.
I wouldn't call it rare for Purple Finches and House Finches to have the same coloration, just uncommon. I do not deny that both of these Finch species have different coloring, but I think my point was missed so I'll try to clarify.
Feather coloration in the bird kingdom within a species is highly variable. Diet, age, sex, feather wear, and even the lighting situation all being factors in what a bird's feather color looks like. GISS (General Impression, Size and Shape) is a huge part in identifying birds. But feather color can be deceiving, often leading to a missed ID by an inexperienced birder. The point I was trying to make is that it is better to rely on the GISS of the bird, rather than it's color. When identifying a bird, I rank what I see in this order: Size, shape, call (if any), behavior, habitat, and finally color. To summarize, with these two species being so similar, color should be the last thing a birder should look at when separating these birds.