Thanks Marie, I will crop in the larvae and post it. Would they be harmful or 
influence the female to avoid this nest box? Appreciate your help!

Diana

dianawhitingphotography.com


> On May 17, 2020, at 6:59 PM, Marie P. Read <m...@cornell.edu> wrote:
> 
> Hi Diana and Cayugabirders,
> 
> Here is what birdsoftheworld.org (formerly Birds of North America online) 
> says about Prothonotary Warbler nesting:
> 
> <Nest Site
> Selection Process
> Males establish territories around one or several suitable nest sites, and 
> place moss inside cavities before females arrive. Male displays at each 
> cavity. Female selects nest cavity from among those available. Settlement by 
> female is related partly to quality or number of nest cavities available> 
> and 
> <Nest
> Construction Process
> Male places moss in potential nest sites. Amount of moss varies from several 
> pieces to foundation 1–8 cm deep, and male may fashion nest cup in moss. 
> Female alone constructs remainder of nest and lining, with male accompanying 
> but not assisting. >
> and
> <Nonbreeding Nests
> Males place various amounts of moss (but not complete nests) in all available 
> cavities within their territory.>
> 
> No mention of larvae. I can't quite tell what kind of larvae they are from 
> the one photo I can see on your site. But very interesting observation. I 
> didn't notice anything like this obvious new hatch of larvae on the 3 boxes I 
> observed there last week at Armitage Rd. I also saw/heard at least 3 
> different males along the road.
> 
> Marie
> 
> 
> 
> 
> 
> 
> 
> 
> 
> 
> Marie Read Wildlife Photography
> 452 Ringwood Road
> Freeville NY  13068 USA
> 
> e-mail   m...@cornell.edu
> Website:     http://www.marieread.com
> 
> AUTHOR of:
> Mastering Bird Photography: The Art, Craft, and Technique of Photographing 
> Birds and Their Behavior
> 
> https://rockynook.com/shop/photography/mastering-bird-photography/?REF=101/
> ________________________________________
> From: bounce-124636532-5851...@list.cornell.edu 
> [bounce-124636532-5851...@list.cornell.edu] on behalf of Whitings 
> [whiti...@roadrunner.com]
> Sent: Sunday, May 17, 2020 6:02 PM
> To: CAYUGABIRDS-L
> Subject: [cayugabirds-l] Prothonotary Warbler
> 
> Hi All,
> I was able to watch the Prothonotary Warbler on Armitage Rd. For.  an 
> extended period of time. In the morning it was mostly foraging and singing as 
> well as displaying periodically. Then in mid day, it started bringing moss 
> into the nest box. I was wondering if this is the male making moss offerings. 
> I never saw more than one bird together that day.  Occasionally it would 
> leave with a pale green larvae in it’s peak. After looking at photos when I 
> got home, I noticed that there was a whole area of larvae around the nest box 
> hole. Someone else who was observing at a different angle thought it was 
> adhering insects to the box. I only could see the bird bringing back moss, 
> but can anyone explain the larvae at the nest hole? There are a few photos 
> https://www.dianawhitingphotography.com/Galleries/Favorites/Favorites-2020/i-5q7LXPJ/buy
> 
> 
> Diana Whiting
> dianawhitingphotography.com
> 
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