Purple Finch Vireo Song

photo of Purple Finch © Lang ElliottSometimes even the expert (me!) gets confused, about things that I am supposedly quite familiar with. Such was the case in the summer of 2007 during a visit with friends in the the hills south of Corvallis, Oregon.

I got up early one morning and went in search of an immature Cooper’s Hawk which one of my friends had heard the day before near the top of a hill. As I approached the spot, my attention was drawn to a vireo of some sort (or so I thought), singing phrase after phrase from the top of a fir tree. Not being that familiar with western vireos, I was not sure which species I was listening to. Within seconds, I heard a Cooper’s Hawk give several whining screams from nearby. My mind, which was a bit groggy from lack of sleep, started putting things together, but failed to grasp the full import of the situation.

A little voice inside told me that the “singing” was a response to the presence of the hawk. But what the voice failed to inform me was that I wasn’t hearing a vireo at all … I was actually hearing the so-called “vireo song” of a Purple Finch (which I was already familiar with and which I firmly believe is given in response to aerial predators, based on observations of finches back home in New York). My mistake is evident when you hear me comment on the recording, but notice that I caught my error before I finished talking:

Purple Finch responding with ‘vireo-song’ in the presence of a Cooper’s Hawk. 7:30am, 8 July 2007, near Corvallis, Oregon. Recorded by Lang Elliott.

The “vireo song” of the Purple Finch is fairly well-known, although in reality it is not really a “song.” It was described by Aretas A. Saunders about 75 years ago, and he correctly noted that the sound sequence was similar to the song of a vireo. But Aretas and virtually everyone who has followed never made the connection to aerial predators (at least I don’t think anybody has). Then I come along and observe three cases of the vocalization being given by Purple Finches in the presence of hawks.

Granted, a sample size of three is not much, but the mere fact that a Purple Finch would do such a thing when a hawk is nearby convinces me that my claim is accurate. And it tells me that this so-called “song” is actually an “alarm call” that reveals the bird’s concerned state. So, the Purple Finch’s “vireo song” is not really a song. Rather, it’s an alarm call that might be confused with a vireo’s song and that is given in the presence of an aerial predator.

Got that? … a vireo-like song that is actually not a song and that is not made by a vireo, but rather by a finch!

Are any of you familiar with this vocalization of the Purple Finch? Do any of you take exception to my conclusion about its function? Has anyone ever heard them do this in the presence of an aerial predator? Am I crazy for thinking it is an aerial predator alarm response? Whatya think? Am I off the mark here, or have I really discovered something neat?

Comments

  1. Daniel Parker says:

    This may amaze you but I’ve never heard a Purple Finch, only the House Finch living in SE NY. Do House Finches do a vireo song too?

  2. Leda Beth Gray says:

    I believe I just heard that call in Blue Hill, ME and did learn about it the hard way many years ago. I spent 20 minutes or so creeping up on an unknown call on coastal California and found a female purple finch that was making the sound. It is in the open on the top of a bare limbed tree. Just now I heard it here in Maine and couldn’t find the bird but soon a female purple finch appeared at the feeder. There had been three males around. Anyway the behavior in both cases suggests to me it is not an alarm call. It has been many years since I heard it and it does sound vireo like but not quite right for vireos around here so I think that is what it was.

  3. Zack Frieben says:

    I hear Red-Breasted Nuthatch in the background, a chickadee, the Cooper’s Hawk, and a flicker. I have never heard the vireo song of the Purple Finch because I rarely see them here in southern Michigan. I have heard their normal song, however.

  4. http://www.flickr.com/photos/68166408@N00/6570548413/

    anyone know this common bird? The local bird club here cant! Greenville, SC

  5. Bill Bailey says:

    I think it may possibly be a response to predators in general. They do that while sitting our trees when the cats creep along the deck. I have also been alerted to snakes in the yard by this same song. Or at least a close variant of the song. Very cool recordings. I will visit here often and tell my bird-brained friends too.

  6. Wil Hershberger says:

    Very cool. Certainly an interesting observation and great that you have the context in the recording itself.
    Very nice,

  7. That’s fascinating! Makes sense that this would be an aerial predator alarm, especially given the short repetitive form of the call. Wow (again).

  8. Once again your birds have dumbfounded my indoor cats. Ears perked at the “vireo”/finch, one head turned at the sound of the Cooper’s. Amusing.
    But not as startling as the finch doing a vireo impression !— nature never ceases to amaze me.

    ps — thanks, rather late, to Lang, Sharon, and Wil who offered suggestions as to why my recordings were not playing. Yes – working off a rather old laptop that is terribly slow. Updates to flash player, etc will probably cause this whole thing to crash. I ‘m thinking it’s time for a new laptop! Thanks for your feedback. 🙂

  9. I’m not familiar with the vireo song of the Purple Finch, but you can bet your boots I’ll be paying attention now.

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