It's been brought to my attention that the usage of the term "4th cycle" may be a bit misleading. I often use 4th cycle for birds that are very close to being adults, but may show a few signs of immaturity. For instance, this American Herring looks mostly adult, less its pink bill with black subterminal markings that are a bit more defined than a winter adult. Also note the sparse black marks on the tail:
 |
Milwaukee, WI. 02 December 2012. |
Another example of what I would call a 4th cycle is this Thayer's with just a few specks on the uppertail and the black subterminal marks on the bill:
 |
Lake County, IL. 16 December 2012. |
Although these individuals may very well be in their 4th plumage cycle, there is no definite way to prove that without more evidence from banded individuals. How can I be sure this isnt' a very advanced 3rd cycle, or even a somewhat retarded 5th cycle? So, from this day forward, I've chosen to abandon the usage of "4th cycle" without inserting a disclaimer such as "possible 4th cycle". Alvaro Jaramillo first brought this to my attention and argued the term "near adult" is much more informative and less assuming - I agree!
I do feel, however, that we should continue ageing 1st, 2nd and 3rd cycle birds as such since we know so much more about what each generation of those feathers should look like, for the most part. I am tentatively choosing to label birds with marked tails, tertials and sub-adult like bills "3rd cycles". I will be happy to adjust the usage of this term if anyone can provide me with a 4th cycle+ example of a bird showing these features. Although there may be some guess-work involved here as well, it's a convenient system that we as field observers must have in order to communicate.
This comment has been removed by a blog administrator.
ReplyDeleteFrance Escort Guide est le site où vous pourrez revenir plusieurs fois par jour pour voir les nouvelles girls inscrites près de chez vous pour des rencontres les plus chaudes. Si vous rencontrez ou voyez une annonce d'escort qui ne correspond pas à la réalité, n'hésitez pas nous contacter, nous ferons notre possible pour n'avoir que des vraies annonces pour faire de vraies rencontres coquines. Jouissez d’une rencontre agréable grâce aux services d’une escort girl.Une telle rencontre coquine peut être motivée par de nombreux motifs, la sexualité n’est pas toujours citée en première position. Il est tout à fait envisageable de bénéficier d’une rencontre coquine sans aucune intimité spéciale. Escort France
ReplyDeleteMuch thanks to you for another extraordinary article. Where else would anyone be able to get that sort of data in such a flawless method for composing? I have a presentation one week from now, and I am on the search for such data. Romanian Escorts
ReplyDeleteBucharest Escorts Independent with sexy Escort Girls. Beautiful high class girls in Bucharest. Incall and outcall appointments in convenient locations.
ReplyDeleteIn this section you find independent escorts, escort agencies and strip clubs from Bucharest, Romania.Bucharest escorts
ReplyDeleteWelcome at Bucharest escort directory. bucharest escorts In this section you find independent escorts, escort agencies and strip clubs from Bucharest, Romania.bucharest escorts
Very beautifully written blog, Fascinatingly written.
ReplyDeleteexxxtrasmall
Superlative style of composing that each new blogger tries to have.
ReplyDeletenubilescasting tube
Faultless and amazing online journal!
ReplyDeletehttps://www.blackvalleygirls.com
I think I have never seen such blogs ever before that has complete things with all details which I want. So kindly update this ever for us.
ReplyDeleteFamilypies porn tube
I have been searching to find a comfort or effective procedure to complete this process and I think this is the most suitable way to do it effectively.
ReplyDeletehttps://www.bffs.com
Admiring the time and effort you put into your blog and detailed information you offer!..
ReplyDeleteexxxtrasmall1.com
Wow what a Great Information about World Day its very nice informative post. thanks for the post.
ReplyDeletenubilescasting tube
This comment has been removed by a blog administrator.
ReplyDeleteThis comment has been removed by a blog administrator.
ReplyDeleteThis comment has been removed by a blog administrator.
ReplyDeleteThis comment has been removed by a blog administrator.
ReplyDeleteI just thought it may be an idea to post incase anyone else was having problems researching but I am a little unsure if I am allowed to put names and addresses on here.
ReplyDeletenubilescasting tube
This comment has been removed by a blog administrator.
ReplyDeleteto help threesome finder, cuckolding, swingers find a woman for threesome or third partner for three way dating. unicorn dating site
ReplyDeleteGet huge discount on Home and Kitchen Appliances,Split and Window Air Conditioner, Mobiles & Laptops online , Television, Speakers & more electronics at best price.
ReplyDeletepanasonic inverter split ac
I was eager to find this page. I needed to thank you for ones time for this especially awesome read!! I certainly truly preferred all aspects of it and I likewise have you book-set apart to look at new data in your blog.
ReplyDeleteauto insurance