floraphile Posted December 30, 2019 Share Posted December 30, 2019 Hi, All-- Dauphin Island, AL April 16 2019. Ring Billed Gull? Juvenile or First Winter or in transition between the two? The beak is two-toned like a FW, but there is no grey on the back. Link to comment Share on other sites More sharing options...
AlexHenry Posted December 30, 2019 Share Posted December 30, 2019 Bill looks too large for Ring-bill, I'd suggest Herring Gull. 1 Link to comment Share on other sites More sharing options...
Nivalis Posted December 30, 2019 Share Posted December 30, 2019 I would go with a herring 1 Link to comment Share on other sites More sharing options...
Tony Leukering Posted December 31, 2019 Share Posted December 31, 2019 Immature Herring -- there should be no juveniles of either Ring-billed or Herring in December, much less in April. Link to comment Share on other sites More sharing options...
floraphile Posted March 4, 2020 Author Share Posted March 4, 2020 On 12/31/2019 at 2:05 PM, Tony Leukering said: Immature Herring -- there should be no juveniles of either Ring-billed or Herring in December, much less in April. Hi, Tony! For clarification: Do you mean only adults would be seen in my area ("non-breeding" range per Cornell site) in Winter & Spring? Do Juveniles not migrate or do they mature in time for migration? Link to comment Share on other sites More sharing options...
Tony Leukering Posted March 4, 2020 Share Posted March 4, 2020 1 hour ago, floraphile said: Hi, Tony! For clarification: Do you mean only adults would be seen in my area ("non-breeding" range per Cornell site) in Winter & Spring? Do Juveniles not migrate or do they mature in time for migration? No. A juvenile bird is one that is in juvenile plumage. I mean that there are no gulls in juvenile plumage in the northern hemisphere in that time period, which means that there are no juvenile gulls in that time period. https://cobirds.org/CFO/ColoradoBirds/InTheScope/87.pdf https://cobirds.org/CFO/ColoradoBirds/InTheScope/24.pdf Link to comment Share on other sites More sharing options...
Kerri Posted March 4, 2020 Share Posted March 4, 2020 For what it's worth - The way I interpret what Tony stated is that there is a difference between juveniles and immature. At that time of the year there would be no juveniles only immature. Link to comment Share on other sites More sharing options...
floraphile Posted March 4, 2020 Author Share Posted March 4, 2020 32 minutes ago, Tony Leukering said: No. A juvenile bird is one that is in juvenile plumage. I mean that there are no gulls in juvenile plumage in the northern hemisphere in that time period, which means that there are no juvenile gulls in that time period. https://cobirds.org/CFO/ColoradoBirds/InTheScope/87.pdf https://cobirds.org/CFO/ColoradoBirds/InTheScope/24.pdf Thank you for sharing your excellent articles. ? Link to comment Share on other sites More sharing options...
Jefferson Shank Posted March 4, 2020 Share Posted March 4, 2020 Immature Herring -- there should be no juveniles of either Ring-billed or Herring in December, much less in April. agreed 1 Link to comment Share on other sites More sharing options...
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