Monday, November 26, 2007

recovery information for a Willow Flycatcher(!!)

Hi Folks

We just received news that a Willow Flycatcher (band # 2460-68120; pictured below aside a Hammond's Flycatcher) that we captured on August 9, 2007 at our Lucky Peak fall migration station was originally banded by a colleague with the Utah DNR on August 25, 2006 in Hailstone, UT!! At least 250 miles as the crow flies ....

The bird is a 1-year-old female (hatched in 2006) - based on molt limits (not having replaced all feathers in the wing - a characteristic of many 1-year-old birds) and a brood patch.

Interestingly, Willow Flycatchers don't breed at Lucky Peak, we only catch an average of about 2 per year, and this bird was our only Willow of the fall 2007 season. Meanwhile, we caught about 250 Willows in a couple years at Camas NWR (more directly N of Utah) with no foreign encounters ....

As much as I was hoping to get a breeding location on this bird, it's pretty cool info to know it was migrating through Utah in 2006 and southwestern Idaho in 2007. And, the timing of each capture makes sense based on molt strategy because adults migrate earlier than immatures in this species.


Willow Flycatcher (right side in both photos) captured at Lucky Peak on Aug 9, 2007. This bird was originally banded as an immature bird on August 25, 2006 in Hailstone, Utah... For those Empidonax fanatics out there, that's a Hammond's Flycatcher on the left; notice the differences in bill size (bigger/wider on Willow), plumage color (greener upperparts on Hammond's vs. browner upperparts and a white throat on the Willow), and the lack of eye-ring on the Willow.


Sunday, November 25, 2007

New website

IBO has a brand spankin' new website. We are really excited with the new look. Many thanks to Holly Funk who donated her time and creative expertise in designing a beautiful website.

Please visit: www.idahobirdobservatory.org

Friday, November 02, 2007

Final Raptor Numbers at Lucky Peak

On Wed, Oct 31 the hawk counters (Chadi & Kyle) sat on the hill counting southbound raptors for the last time in 2007 - thus bringing to a close the fall 2007 migration monitoring season. I should note that some raptors, including Northern Goshawks (the counters mentioned seeing several adults on the move during the last few days), are certainly continuing to migrate through... It's just that the #s dwindle after October and it's important to stick to standardized dates for our monitoring to mean anything.

OK, enough babbling ... on to the #s for diurnal raptors and owls.

Diurnal Raptor season totals, 25 Aug to 31 Oct, 2007 (in descending order of abundance):
Turkey Vulture 1189
Red-tailed Hawk 1059
Sharp-shinned Hawk 947
American Kestrel 581
Cooper's Hawk 494
Northern Harrier 135
Northern Goshawk 76 (2nd best year ever; well over annual average of 43)
Osprey 55
Swainson's Hawk 41
Golden Eagle 35
Merlin 28
Broad-winged Hawk 20
Peregrine Falcon 12
Rough-legged Hawk 7
Ferruginous Hawk 4
Bald Eagle 3
Prairie Falcon 1
Red-shouldered Hawk 1

...for a total of 4,814 counted (for those doing the math, this includes several categories of unidentified raptors that observers couldn't be absolutely certain about due to poor views). This is lower than average but is up 300 birds from last year (which was the lowest since 1995). Of the 5 most common species, RT Hawks and vultures #s in 2007 are above average whereas the other 3 (Sharp-shins, Cooper's, and kestrels) are all below average. In particular, American Kestrel #s are just over 1/2 of average and 2006 & 2007 have been the 2 lowest years since the study began in the mid-1990s.

Maxi Galmes (Argentina) holding an (unhappy) immature Northern Goshawk. 2007 was one of our best years for this charismatic raptor species.


Now, for the owl totals (28 Aug to 28 Oct):
Northern Saw-whet Owl 120
Flammulated Owl 6

Though the #s seem less impressive than for the raptors (especially for the Flammulated), this was the best overall owl season since 2003. And, the Saw-whets likely generate the most fascination and awe on a 'per-bird' basis- as all visitors who've enjoyed seeing these guys up close know.


Lastly, the top ten songbird species (that I neglected to post last time):
Dark-eyed Junco 1111 (a new record)
Ruby-crowned Kinglet 788 (2nd lowest year)
White-crowned Sparrow 403
Dusky Flycatcher 356
Yellow Warbler 290 (a new record)
MacGillivray's Warbler 285
Yellow-rumped Warbler 284
Spotted Towhee 238
Warbling Vireo 216 (a new record)
Western Tanager 201

Cheers,

Jay

Monday, October 29, 2007

Final songbird #s from Lucky Peak

Hi Folks .... (scroll down for a few photos)

I was delayed in getting to this because a day after closing up shop (on Oct 15) I flew east for a high school buddy's wedding in the Catskills Mountains of NY (awesome fall colors! - 1st time in many years that I've gotten to see that) and a short family visit. Thus, I just got done counting & re-counting the #s. Here we go:

During autumn 2007 (16 July to Oct 15), we captured 5771 birds of 56 different species. Our netting effort this year was 4116 mist net hours; this effort is lower than usual because we experienced a number of rainy and/or windy days that either prevented us from netting or reduced the number of nets that could be opened. The 2007 capture rate of 1.40 birds per mist net hour (which comes to 70 birds on an average day on which we open all 10 nets for 5 hours) is the 2nd highest in the 11 years of the study (2nd to the record season of 2006, when the capture rate was an amazing 1.71). Thus, if anything we are seeing a slight increase in captures over the years for a number of species. And, this is reflected in the fact that 2007 set record years for 8 species (and several others were tied or close 2nd). The new records set in 2007 are (in numerical order):

Dark-eyed Junco 1111 (previous high of 918 in 2006)
Yellow Warbler 290 (previous high of 186 in 2001)
Warbling Vireo 216 (previous high of 193 in 2006)
Cassin's Vireo 117 (previous high of 114 in 1999)
Brewer's Sparrow 87 (previous high of 58 in 2000)
Swainson's Thrush 26 (previous high of 20 in 2006)
Northern Pygmy-owl 10 (previous high of 5 in 2000)
Steller's Jay 4 (previous high of 3 in 2001)

Interestingly, 2007 was the first year in which Ruby-crowned Kinglets (shown here) were not the most abundant species (we caught 788; 2nd to Dark-eyed Juncos this year) and only the 3rd time we've not banded at least 1000 of this species in a season. We lost so many days and partial days to weather during the RC Kinglet peak (mid-Sept into October) that this result isn't surprising. But, it really was a stellar year for the juncos ...


Rarities/highlights from this season included the 5th Blackpoll Warbler we've banded at this site (Sept 7), our first capture of a Black-throated Gray Warbler (Aug 19), our 5th American Redstart (Aug 22), our 4th ever Green-tailed Towhee, and 4 Golden-crowned Sparrows (Sep 17, 21 [2 birds] and Oct 7). Also, in early August we captured a Willow Flycatcher that was previously banded by someone else (don't know who or where yet...).

Enjoy the late fall/early winter birding!

Jay

2 pictures of a Northern Pygmy-owl captured on Oct 11, 2007; notice the side view of the false eye-spot (below).


A Brown Creeper captured on Oct 15, 2007.

Wednesday, October 10, 2007

10-10-07 update

Sorry Folks for the long delay!

Between the bad weather getting me down, a lovely stomach flu ;-), and the activity being generally busy on Lucky Peak, I haven't had time to post for a while. And now I find myself 5 days from the end of the songbird season (Carlos is flying home to Venezuela tomorrow!) ....

Many weather events have punctuated the last 2.5 weeks and have made the migration a little helter-skelter. In fact, the owl netting has been the most consistent aspect of the project lately as Northern Saw-whet Owl migration has picked up speed and multiple owls have been caught nightly for at least the last week. If only we could get a calm night, maybe we could catch more!

Hawks & songbirds have been more hit or miss as it seems we've either had rain or strong SE winds for much of the last couple weeks. However, on days without these downer types of weather, flights have been very strong as birds seem to be migrating in any window of decent weather. Thus, I expect any decent weather days in the coming week or 2 to be pretty good days to see loads of juncos as well as the possibility of a Northern Goshawk, Merlin, or maybe even a Rough-legged Hawk migrate past Lucky Peak.

Highlights from the last week include a possible Slate-colored Junco (maybe it was a hybrid but pretty close anyway) captured today and an adult 'Harlan's' Red-tailed Hawk caught by Eric Hallingstad on Saturday. We see Harlan's every year but rarely catch them - this may be the first adult we've ever banded! See pictures below.

Lastly, we finish the songbird season on Monday, October 15th; owls wrap up on Oct 28; and hawk counting continues thru the end of the month.

Cheers,

Jay
--------------------------------------------------
Below are 3 images of the adult Harlan's Hawk banded on October 6, 2007. Noted the white spots on the dark chest and the marbled tail:




The next 2 images are from a Dark-eyed Junco showing signs of being the Slate-colored subspecies. The photos didn't come out too well (terrible lighting today) but the first picture shows that the sides of the chest are grayish and lack the pink tones of Oregon or Pink-sided. However, the back (2nd image) shows more brownish than ideal for Slate-colored (especially for an adult, which this bird was). Thus, likely best left as an Unidentified Dark-eyed Junco subspecies.
Here is an adult male Oregon Junco for comparison - note the pink sides of the chest.

Sunday, September 23, 2007

9-23 update

Hi Folks

Just a quick update. Friday (Sept 21) was a great migration day at Lucky Peak: the highest one-day totals for songbirds (165 banded) and raptors (522 counted) of the season. Probably this was a big movement in front of our recent rain event but this is also traditionally a peak time for abundance of migrants in this area.

10 Broad-winged Hawks were seen on Friday alone, bringing the season
total to 16. Sept 10-25 (especially the 20th-25th) are usually the
best dates for this species (with some continuing into early October) so I
expect more to pass by in the coming week as high pressure weather
resumes. Also, though far rarer (not annual), Red-shouldered Hawks
seem to appear most often in the last 10 days of September.

Songbirds are now dominated by RC Kinglets, WC Sparrows, and DE Juncos
and we are seeing an earlier than usual push for juncos (who seem to
have the most variable timing of all species we catch but often peak
in October). But, we are still seeing a some warblers, Cassin's
Vireos, Hammond's Flycatchers, & others in the mix. Pine Grosbeaks
were around for a few days late last week & I'm hoping for more ....

Happy birding,

Jay

Wednesday, September 19, 2007

9-19 update (GC Sparrow, Pine Grosbeak, & more)

Hi Birders

After a week visiting family in CT (and seeing some great eastern birds like Philadelphia Vireo and many warblers), I returned to Lucky Peak Monday AM. Since then we've had variable success due to the weather but we had our first big push of Ruby-crowned Kinglets (53 banded) yesterday. Several songbird highlights from the last few days include:

- an adult Golden-crowned Sparrow banded on Monday, 9/17 (our first of the season & we usually catch immatures);


- an adult male Pine Grosbeak seen/heard over camp yesterday (these are not annual and, when they do occur, tend to appear in October ... I hope this means more are on the way but I have no idea);

- 1 or more Winter Wrens calling the last couple days.

Diurnal raptor numbers seem to be up from last year (so far anyway) and in the last week or so we've seen the first N Goshawks & Merlins. Also, adults of both Sharp-shinned & Cooper's Hawks are building in #.

Lastly, small forest owls (Flammulated & Northern Saw-whet) have started moving in the last week - albeit in small numbers so far.

Cheers,

Jay

Friday, September 07, 2007

Blackpoll Warbler & more

The last 2 days have been pretty 'happening' on Lucky Peak. Thurs, Sep 6 was a busy day for both songbirds (~ 95 banded, including 30 WC Sparrows) and raptors (244 counted - busiest of the season so far). We followed that up today with our first Blackpoll Warbler in the nets at Lucky Peak since 2002 (8th in 11 years; pics below) as well as our first GC Kinglets of the season; since I left at lunchtime, I don't know how the hawk flight was going yet but I have to imagine it's another great day up there ....

Here is a series of shots showing the immature Blackpoll Warbler captured & banded today. For separation from autumn-plumaged Bay-breasted & Pine Warblers, notice especially the foot color, the long wings and short tail, the white undertail coverts, and the relatively short extension of the tail beyond the undertail coverts.


Due to the poor lighting shortly after sunrise, we struggled to get decent pictures of the GC Kinglets but here's a slightly blurry one just to get a sense of how small these guys really are (female left, male right) ...


Here is a shot of an adult Gambel's White-crowned Sparrow (on left; pale lores) for comparison with the shots of the Mountain subspecies I posted 2 days ago (and 1 re-posted here - on right; dark lores & slightly pinker bill) ....


All for now,

Jay

Wednesday, September 05, 2007

A note on the Ferruginous ...

Not to beat a dead horse but I realized that some folks might be wondering why all the excitement about the Ferruginous Hawk. Though we count/monitor raptors every fall at Lucky Peak (since 1994) and we know that Ferruginous Hawks breed within 20 miles or less (out in the desert), we see them very infrequently during our migration counts - to the tune of between 0 - 7 individuals seen in a given year. Thus, we see fewer Ferruginous Hawks than we do Broad-winged Hawks (average of over 17 per year)!

Also, though not federally listed, there is concern in many areas of the species range due to conversion of native grasslands to agriculture, development, etc. (for more info, check out: http://www.ferruginoushawk.org/). Thus, in addition to being one of the most beautiful birds of prey, it's also one of those most threatened by humans and can be considered an indicator species - hinting at the condition of its habitat. As Deniz mentioned in the first post, I noticed that the muscle condition of this bird was quite poor - indicating that it has not been eating enough. Though we know that something on the order of 50% or more of immature birds die before reaching the age of 1, it was a little more real to see a bird that may be below the 50th percentile - so to speak (though we sent it on its way again with wishes of success ...).

Lastly, as you can see by checking out the satellite tracking links on the http://www.ferruginoushawk.org/ website, this species seems to be more of a nomad than many of our other migratory raptors ... which may be why we see so few from our site that are migrating in a traditional N-S direction during autumn.

Anyway, just some FYI about a cool bird!

Jay

9-5 update

Hi Folks

Thanks to Deniz for posting and to Geoff for sending his photos of the immature Ferruginous .... watching this bird approach the trapping station and slowly walk/hop (not fly) its way into the trap was pretty cool! I just wanted to add one more picture (also by Geoff) - this one of Kyle (a hawkwatcher) holding its wings open:


In other news, songbird #s have been moderate but diverse and today (9/5) was our best day of the month so far (64 new, 8 recaptures). We're getting more adults of the Neotropical migrants and are also starting to catch increasing #s of WC Sparrows and RC Kinglets. The vast majority (> 99%) of the White-crowned Sparrows that we capture at Lucky Peak are of the Gambel's subspecies ('West Taiga' in Sibley) but today we banded an adult of the Mountain subspecies ('Interior West' in Sibley) - differentiated by the darker, pinker bill and the dark feathers on the lores (just behind the bill). Here are 2 shots:



Another capture worth highlighting today was an adult Cassin's Vireo looking very bright & fresh. As this is the time of year when vagrant Blue-headed Vireos are most likely, I thought I'd post a couple shots of this sharp Cassin's as a basis for comparison with any potential Blue-headeds. Notice that although this bird is quite bright, especially on the flanks, there is not a sharp contrast between the head and back and that there is a green infusion in the otherwise grayish head feathers seen from all angles.




Raptor #s are starting to pick up and the next month promises to be awesome (unless its raining). I saw an immature N Goshawk on Monday and Merlins are due any day now ....

OK, all for now - happy birding,

Jay

Tuesday, September 04, 2007

Ferruginous Hawk



Yesterday Jay was fortunate to capture a young Ferruginous Hawk at the Lucky Peak West blind. I don't know all the measurements of the bird, but what I do know is that the bird had a sharp keel. After banding, measurements, and photos, the bird was released.



(All photos are courtesy of Geoff Urwin)




Sunday, September 02, 2007

Sept 2 update

First, let me apologize for the long delay between posts ... With several new crewmembers coming on board and both raptor projects starting in the last week, things have been busier than usual of late.

That said, it's been a pretty exciting 10 days up on Lucky Peak as bird migration study is now occurring 24-7! Songbirds have been moderately busy but very diverse over the last 10 days (see season totals below).

The hawk migration count began Sat, Aug 25 and hawk trapping began the next day. The hawk count has been relatively slow so far but is starting to gain momentum; meanwhile, hawk trapping has been quite successful - especially considering that no big flights have occurred yet. The 2006 hawk flight was the lowest in the 12 years of standardized monitoring at Lucky Peak (a pattern also observed at most other count sites in the West last year but we don't really have a sense for what caused the dip in #s); thus, it will be interesting to see whether 2007 brings some recovery.

The owl study began on night of Tues, Aug 28 and a Flammulated Owl was captured in the 1st net run of the season (we hoped this would be a good omen) but we haven't caught another owl since. Owl banding is usually best after Sept 15 .... We did catch a Pallid Bat on the 29th and, knock on wood, we haven't captured a flying squirrel yet!

Now for the songbird #s. From July 16 through August 31, we captured 2,885 birds of 52 species. Since the year 2000 (when we standardized our start date at mid-July), this is the 2nd highest mid-season total - 2nd only to 2,893 birds captured by Aug 31 in 2006. Thus, we are only 8 birds off the record 2006 pace - most mid-season totals have been between 2,100 to 2,300 birds. A Green-tailed Towhee (our 4th in 11 years at Lucky Peak) was new for the season on 31 Aug and we caught our first 2 White-crowned Sparrows on 1 Sep.

I didn't bring all of the exact #s with me but the top ten species through Aug 31 were:

1) Dusky Flycatcher (312)
2) Yellow Warbler (278 - a single-season record)
3) MacGillivray's Warbler (~ 250)
4) Yellow-rumped Warbler (~230)
5) Western Tanager (190)
6) Spotted Towhee (~140)
7) Chipping Sparrow (~130)
8) Warbling Vireo (~120)
9) Nashville Warbler (~120)
10) Brewer's Sparrow (80 - a single-season record)

Though less impressive (it seems that this species is more common as a spring migrant in southern Idaho), we are also at a single-season record for Swainson's Thrushes (22; previous record was 20). Also, we are now starting to transition from Neotropical migrants to temperate migrants - juncos, kinglets, and WC Sparrows will all become more common in the next couple weeks while most longer-distance migrants will start to diminish in #s.

Now, a few pics:
Spotted (adult) and Green-tailed (immature) Towhees; Aug 31, 2007. This is the 4th Green-tailed we've captured in 11 seasons - all since 2004. Note the difference in eye color.

A closer view of the same adult Spotted Towhee.


(Apologies for the terrible photo quality, especially to John ;-) ... in the last week, we were excited to get a visit from Caroline and John ... our Lucky Peak MVPs over the last 2 seasons while I was away working at Camas NWR. They enjoyed some songbird banding (& the 2007 crew enjoyed working with them as well), some hawk trapping, and ....

.... a visit from their pal, Gary Robinson (center) - our songbird MVP volunteer over the last few seasons (also shown here with Craters of the Moon biologist Mike Munts).

Cheers & happy September,

Jay

Thursday, August 23, 2007

Wed, Aug 22 Lucky Peak update (American Redstart)

After a post-cold-front slowdown experienced on Mon & Tues, the birds were moving again Wed and it was a very diverse and busy day. We banded 99 birds (also 8 recaptures) of 26 species and added 2 species (Hairy Woodpecker and American Redstart) to our season total. I don't have all the species by species details but the high numbers were Wilson's Warbler and Warbling Vireo, each with 12 banded; our 1 day record for Wilson's at Lucky Peak is 16, so 12 is a pretty good day for this site. We also had our first real 'push' of Hammond's Flycatchers (7).

The American Redstart marks only the 5th that we have captured in 11 years at this banding station (though we have seen 4 or 5 others & we probably see or catch them on average in 2 out of every 3 years) and this was an adult female. In comparison, we banded 18 redstarts at Camas NWR during autumn '05 & '06 combined! Also, though Hairy Woodpeckers are resident breeders at Lucky Peak, we catch them rarely and this was our 7th in 11 years.

In other news, Carlos and I took a wandering hike (not really lost but the trail we took didn't 'loop in' as I expected it would and I think Carlos wondered if we'd get back before dark ...) off the E side of Lucky Peak on Tues evening. Highlights included a scolding Winter Wren (I usually don't expect them here until the first week in Sept and we don't catch these guys every year), a pair of Pileated Woodpeckers (an impressive lifer for Carlos - he sees some big woodpeckers at home in Venezuela but was pretty excited about this), a Dusky Grouse, and a few Elk.

Thanks to Bob Whitlach (he and Sue Norton spent the morning with us yesterday) for the following pictures ....

American Redstart adult female; 8-22-07. Our 5th ever & first in the nets since 2002.


The fattest Black-headed Grosbeak I have ever seen. Lean (carrying no fat) grosbeaks tend to weigh between 40-45 grams and, as you can see in this picture taken to prove it (I re-tared the scale just to be sure I wasn't being tricked), this immature male weighed 71.8 grams - about 8 grams heavier than I've ever seen!! His fat was literally bulging everywhere and, like a loon taking off from water, he needed about 15 yards to get airborne!


A young Townsend's Solitaire - notice the broad white edges to the greater (secondary) coverts.


A sharp-looking (recently molted in new feathers), adult Cassin's Vireo.


An immature female Townsend's Warbler.

Immature male (left) and female (right - same bird as above) Townsend's Warblers. Although hard to make out the extent of black on the head and back feathers in this picture, you can see the difference in the median coverts (making up the upper wing bar) - notice that the male's are mostly white with a thin, black line whereas the female's have a more prominent black, triangular wedge penetrating the white part of each feather.


An immature male Western Tanager.

Tuesday, August 21, 2007

LP update--Mon. (20th) & Tues. (21st)

Jay just called me with the total from the last two days...things have been fairly slow due to the cold front that is passing through but expect numbers to pick up soon!

Monday, August 20:

3 Dusky Flycatcher
1 Western Flycatcher
2 Orange-crowned Warbler
2 Wilson's Warbler
1 Townsend's Warbler
2 Audubon's Warbler
2 Yellow Warbler
1 Warbling Vireo
1 Brewer's Sparrow
7 Western Tanager
4 Spotted Towhee
1 Black-headed Grosbeak

TOTAL: 27

Tuesday, August 21:
3 Dusky Flycatcher
1 Western Flycatcher
2 Wilson's Warbler
1 Townsend's Warbler
1 Nashville Warbler
1 Yellow Warbler
4 Warbling Vireo
3 Brewer's Sparrow
1 Chipping Sparrow
1 Pine Siskin
7 Western Tanager
8 Spotted Towhee
2 Swainson's Thrush

TOTAL: 35

In addition, a MacGillivray's Warbler was recapture this morning that was banded 5 days ago. He gained 1.4 grams in 5 days!!

TOP 10 SPECIES:
268 Dusky Flycatcher
251 Yellow Warbler***** season high
217 MacGillivray's Warbler
161 Audubon's Warbler
161 Western Tanager
136 Warbling Vireo
122 Chipping Sparrow
104 Nashville Warbler
103 Spotted Towhee
75 Lazuli Bunting

Thus far this season, a total of 2260 birds have been banded of 48 species!

Sunday, August 19, 2007

Lucky Peak update 8-19-07 - BT Gray Warbler

Hi Folks

The 2007 autumn season at Lucky Peak has continued to be busier than usual for this time of year. The best example of this is that we have already banded almost 250 Yellow Warblers - a species that we have never captured more than 190 of in any prior season!

The most exciting bird of the season (for me anyway) was an immature male Black-throated Gray Warbler that we banded today. Believe it or not (b/c this species occurs in the Owyhee Mountains just 60-100 miles away), this is the first capture or sighting in 11 seasons at Lucky Peak!!

Below is a shot of the BT Gray Warbler alone and then next to a Mountain Chickadee that we caught in the same net run (different net); these 2 pics by Carlos Valeris.


In other news, we banded our 3rd Northern Pygmy-owl of the season yesterday (8-18) and also our first Steller's Jay (no pics handy).

Below are a few more pictorial highlights with captions:

Dusky (left - adult) and Gray (right - immature) Flycatchers; 7-30-07


Hammond's (left - immature) and Willow (right - adult) Flycatchers; 8-9-07. This Willow was a foreign recovery (we didn't band it)! We don't yet know who did & where ...


Smoky sunrise; 8-3-07.


A rattlesnake that was curled up in the mess tent - a foot from my hand while I was washing dishes!! Fortunately it warned me with a couple partial rattles and was very calm.


Good birding,

Jay

Tuesday, August 14, 2007

Follow the signs!


With thanks to a Watchable Wildlife grant, IBO has brand spankin' new signs to help guide you up to Lucky Peak! We put them up Sunday with help from Dave & Carol, Steve, Greg, and 2 great IDFG volunteers--Brian & Shawn. Thanks everyone for your help!
Mission: to contribute to the conservation of western migratory landbirds through cooperative research and public education