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01 June 2009

Bird Songs, Individual Differences

Yesterday I sat at a picnic table in a local regional park for a couple of hours 'studying' the bird songs around me and thinking about how best to describe them. A Yellow-rumped Warbler called the whole time and I took quite a good set of field notes of his song - as in, I could actually interpret them when I got home and almost recall the song in my head.

I wrote:
phrase of two parts:
  • first part consisting of a monotone or slightly ascending trill, moderate speed. Trill equal to a twitter, very slightly buzzed, mostly clear tones;

  • second part, executed immediately after first part, higher pitched, ascending, variable warble of slightly shorter duration than first part (warble = more than two tones) consisting of a variable ascending trill.
Then! I played some warbler calls LOUD on my mp3 player through little portable external speakers I pack around with me (I don't like headphones cuz they get tangled with my bino strap and my eye-glasses cord that I need so I don't lose my glasses when I take them off to read because I'm getting old, you know).

Anyway, the Yellow-rumped Warbler changed its song! After singing the same song for an hour, it changed, seemingly, in response to my play-back! The first part was noticeably higher pitched and definitely ascending and the second part was even shorter than before. Then this new version, Song B, slowly evolved back into Song A, with the second part going back to the Song A sooner than the first part. It repeated Song A again several times, then burst into song B, which again morphed back to song A over several repetitions.

Today, as I sit writing this, with my office window open, a Yellow-rumped Warbler is calling from a nearby fir tree.

Is it singing the exact same song as the one in the park yesterday? No, not really! This song is not in two discernable parts - the monotone trill grading into a more warbling ascending trill at the end. This one is more just a single phrase with the whole thing starting with the monotone trill, upwards, to end in almost individual cheeps. What can I say - it's hell to be detail oriented, and probably boring to read.

Bird Songs, Working Thoughts 1

Complex bird songs don't stick in my head from year to year. I have been birding for 30 years and recognize many sounds of my local species but the complex songs of warblers, vireos, and robin-like ones, for example, have me shredding my auricles.

I've been look at sonograms (spectrographs) from the macaulaylibrary.org in an effort to find a way to remember them. Browsing through the library I finally realize there are many dialects and even individually unique songs for one species. I feel better about myself - it isn't necessarily me being dense - the song I'm hearing for that species IS different than ones on recordings and may be an individual bird!

Recommendations for learning bird songs include:
  • Do your learning in the field
Follow the bird singing and identify it; associating the song to the bird is more likely to stick in your head then.

That would be great with all the time in the world and the ability to 'crane' your neck for hours until the little blighter in the top of a 60-foot spruce tree held still long enough in good light to show its field marks!

Fellow birder Rick Howie wrote: "After making such an effort, it was counter-productive to forget the song until the next time for fear that you would have to spend so much time tracking the beasty again."

This seems to work best for common species you see easily and frequently and are easy to identify. I guess that is how all the buzzes of the Pine Siskin got burned in my brain.

  • Describe the song to yourself and identify it every time you hear it
What words do I use to describe the song? Study sites and guide books use words like "buzz" and "trill" - what's the difference between a slow buzz and a trill? And what's the difference between a 'bounding' warble and a 'flat' warble, as I read on one site?

That's great if you know what species you're hearing in the first place (and you can hear, in the first place) - Catch 22.

  • Trust a fellow birder to tell you what it is - ah, ummm, well, need I say more?
  • Compare the song to a recording which you either
  1. take with you on a CD, tape, mp3 player, or iPod with "Bird Jam" software or
  2. have made written or mental notes to compare with your recordings back home
Have you noticed yet that air temperature, wind, human activity, distance from bird, etc. affect what you hear and which tones are carried?

This is why, I think, the opening tones of the Western Meadowlark are so piercing and loud - they carry quite far and can be heard in different atmospheric and sound-environmenent conditions. It is like they are saying "Here I am! I'm going to sing now! Listen up!"

The recordings are usually much better (more audible frequencies) than what you hear in the field. You can't always hear all the elements under field conditions! The buzzy quality of a weak buzzy tone might get drowned out by other sounds or temperature differences and you perceive more of a pure tone than the buzz on the recording.

Lower air temperatures = denser air = more energy required to move the air / create a sound wave = differences in distance sound carries and the frequencies carried / die-off of lower or higher frequency tones (I'm not sure which).

Also, as mentioned previously, different individuals may sing different songs, and different areas may have different dialects.

WhatBird.com says "Male Lazuli Buntings two years of age and older sing only one song, composed of a series of different syllables, and unique to that individual" OMG!

If you use a sound device in the field, your batteries could die. Then you'd have to rely on some other method - taking notes - or give up.

And, if you tried to remember / used notes - you've forgotten by the time you get back home to your CD player, computer, whatever or can't remember what your notes or musical notations mean.

  • Use a mnemonic such as 'sam peabody'
Who the 'h' is Sam Peabody and do the tones go up or down? Or "sweet, sweet, sweet, a little more sweet" or "chee-erp". I can't remember the mnemonic I chose as a memory jogger!

Who can interpret those descriptions in the field guides without some recording to reference?

Kenn Kaufman in "Advanced Birding" wrote about certainty of identification using all possible clues (re: Empidonax flycatchers) "If you reach the stage at which you feel you can name every Empid you see in the field, you are probably deluding yourself. . . I have studied these birds . . . and examined thousands of museum specimens . . . and individuals - and I believe I can confidently name about 80 percent of the Empids I see"

So, even a real expert puts his identification skills as a percentage of birds seen, not identifying every one. I can do that!

Following posts will list some of the words I am defining for myself to describe songs in 'lay' terms.

Happy avian eaves-dropping!

10 May 2009

Little Big Day 2009 Kootenay Style

Little Big Day (LBD) 2009
Location: East Kootenay, British Columbia, Canada
Team name: Gotta Be Quick
Species count: 115
Placement: finally placed - tied for first!

Weird / uncommon / surprise birds (my team):
  • Marbled Godwit
  • Trumpeter Swan
  • Williamson's Sapsucker
  • American PipiT
Should have but didn't get:
  • House Wren
  • Pileated Woodpecker
  • American Dipper
Complete List all teams (BC abbreviations)
COLO
PBGR
HOGR
RNGR
EAGR
WEGR
AWPE
GBHE
TUSW
TRUS
SNGO
CAGO
WODU
GWTE
MALL
NOPI
BWTE
CITE
NOSL
GADW
EUWI
AMWI
CANV
REDH
RNDU
GRSC
LESC
COGO
BAGO
BUFF
HOME
COME
RUDU
TUVU
OSPR
BAEA
NOHA
SSHA
COHA
RTHA
RLHA
GOEA
AMKE
MERL
PRFA
DUGR
RUGR
VIRA
SORA
AMCO
SACR
KILL
BNST
AMAV
LEYE
SOSA
SPSA
LBCU
WESA
LESA
LBDO
WISN
WIPH
RBGU
ROPI
MODO
VASW
CAHU
RUHU
BEKI
RNSA
WISA
DOWO
HAWO
BBWO
NOFL
PIWO
WIFL
HAFL
DUFL
SAPH
WEKI
TRSW
VGSW
NRWS
CLSW
BASW
GRJA
STJA
BLJA
CLNU
BBMA
AMCR
CORA
BCCH
MOCH
RBNU
WBNU
BRCR
WIWR
MAWR
GCKI
RCKI
WEBL
MOBL
TOSO
AMRO
VATH
AMPI
CEWA
NOSH
EUST
CAVI
OCWA
YEWA
YRWA
TOWA
AMRE
WIWA
SPTO
CHSP
BRSP
VESP
SAVS
FOXP
SOSP
WCSP
DEJU
RWBL
WEME
YHBL
BRBL
BHCO
PIGR
PUFI
CAFI
HOFI
RECR
PISI
AMGO
EVGR
HOSP

01 May 2009

Star Trek XI and the ST Universe

The light-heartedness of the Star Trek universe and its faithful fandom can all be attributed to William Shatner's famous remonstration for us all to "get a life"!

This remark freed us to be regular human beings in between our escapades vicariously accompanying the characters in all the shows and movies (I haven't read any of the books). Because of this remark, we are free in real life to incorporate the ideals of the show as laid out by Gene Rodenberry and the positive qualities of the characters in our day to day achievments and interactions without being labelled a fanatic since we can prove by our meer presence we do indeed have "a life".

Also, I would even go so far as to say, that this remark was the beginning of the 'coming out' of nerds across the universe.

Yeah Star Trek! Yeah G.R.! Yeah W. S.!