Date: 12/2/25 2:20 pm From: John Tumasonis <snakemonev...> Subject: [cobirds] Nashville warbler, Northern Parula, and Chestnut sided warbler....
All: I bit the bullet and decided to check out the warblers near Boulder High today (12-02-25). I found three of the five species reported near the 17th Street and bikeway intersection. Several other birders had seen 4 of 5 species, before I arrived there. Here are a few things I noted:
1) These warblers are keeping close in loose congregations - if you see one species, you'll probably see several others.
2) Nearby flocks of red-breasted nuthatches, juncos, house finches, and bushtits may or may not be associated with the warblers.
3) The warblers I saw a feeding at heights of 12 to 40 feet up in all different kinds of trees, such as, willows, ash, oak, and cottonwood.
4) Almost all the trees being foraged on had some leaves - either desiccated, or turning yellow to brown. Gleaning (something) from both leaves and branches.
5) The warblers don't just "disappear" - they are foraging on both sides of the creek and upslope into brush onto CU campus properties, and Boulder High properties. They are also moving up and down the creek drainage.
6) Reports suggest they are foraging at all times of day: 8, 9, 11, and 12 and afternoon at 3 and 4 pm. They appear very hungry and are always in motion.
If trying to take photos I would suggest 200 to 400 mm lens, with high burst speeds.
And then the big questions: Why are these birds congregating is this location at this time of year? Will they continue through the next cold front coming on Wednesday? And what the heck are they eating?
Thoughts?
John T (Tumasonis), Broomfield CO "I'm not a real birder. I only pretend to be one on CoBirds."
-- -- You received this message because you are subscribed to the Google Groups "Colorado Birds" group. To post to this group, send email to <cobirds...> For more options, visit this group at http://groups.google.com/group/cobirds * All posts should be signed with the poster's full name and city. Include bird species and location in the subject line when appropriate. * Join Colorado Field Ornithologists https://cobirds.org/membership/ --- You received this message because you are subscribed to the Google Groups "Colorado Birds" group. To unsubscribe from this group and stop receiving emails from it, send an email to cobirds+<unsubscribe...> To view this discussion visit https://groups.google.com/d/msgid/cobirds/<d19c4777-1150-475a-adeb-34d6aa5f40c1n...>
