Hummingbird Banding Data from the Rudeen Ranch, Idaho

HUMMINGBIRD BANDING DATA
from the Rudeen Ranch, Power County, Idaho

All "non-Memorial Day Weekend" banding sessions
are presented here.

We began banding hummingbirds at the Rudeen Ranch during Memorial Day weekend, 2003. Since then we've continued the Memorial Day weekend (Sunday and Monday) tradition, and have also banded at other times on the ranch (August 4,5 2004, for instance). In 2006, additional banding was done at the ranch as Fred Bassett trained a new subpermittee in the valley. We are excited to have many more hummingbirds captured and documented on the ranch, but this will necessitate a different analysis of the data -- annual recapture rates from previous years will be affected by multiple trips, and perhaps reduced by an increased pool of non-resident birds banded during migration windows. Survival rates, on the other hand, will be greatly enhanced by increased banding trips.

Through Memorial Day Weekend 2007, we have already banded 1773 hummingbirds at the ranch, and we look forward with great anticipation to the years ahead!

| | 4-5 August 2004 | 24 June 2006 | 9 August 2006

Memorial Day Weekend data are found here. Below we report overall totals and special trips.

NOTE: We returned for two days on 4-5 August 2004. During that time we banded 138 new hummingbirds and captured several that were banded previously, both in 2003 and during our current-year May 2004 trip. Below we provide tables for new birds banded, and recaptures from _____. Recognize that a certain undetermined proportion of these birds are likely migrants from outside this territory -- just passing through.

(4-5 August)

Breakdown of 138 hummingbirds banded at the Rudeen Ranch
(M = Male; F = Female)

SPECIES	RAW NUMBERS			PERCENTAGES
	Totals	Adult		% of Total	Adult
	138	M	F	100%	M	F

Calliope Hummingbird	101	0	101	73.2%	0%	73.2%
Broad-tailed Hummingbird	18	0	18	13.0%	0%	13.0%
Black-chinned Hummingbird	19	3	16	13.8%	15.8%	84.2%

NOTE that...

Most of the adult male hummingbirds have departed
Totals not included above: 1 immature female Black-chinned, 2 immature male Calliopes, 1 immature female Calliope, 1 adult female Rufous, 1 immature male Rufous, and a hybrid (presumed Black-chinned x Calliope) were also banded.
We also captured a female Calliope that was already banded! This bird had been banded by a researcher, Joan Day-Martin, at GreyFeathers Lodge / Lake Roberts, New Mexico as an adult on 8/13/03. This makes this bird at least an After Second Year -aged bird when we captured her!
17 additional birds originally banded in May 2003 (but not encountered in May 2004) were recaptured during the August 2004 trip.

TOTAL of all birds banded in 2004
(Combining "new bands" from May and August trips)

SPECIES	RAW NUMBERS			PERCENTAGES
	Totals	Adult		% of Total	Adult
	348	M	F	100%	M	F

Calliope Hummingbird	265	81	184	76.1%	30.6%	69.4%
Broad-tailed Hummingbird	41	6	35	11.8%	14.6%	85.4%
Black-chinned Hummingbird	42	12	30	12.1%	28.6%	71.4%

All RECAPTURES of hummingbirds originally banded during Memorial Day 2003
(Combining recaptures from May and August trips)
"After Second Year" aged birds

SPECIES	RAW NUMBERS			PERCENTAGES of birds banded in 2003
	Totals	ASY		Recapture rate	ASY
	76	M	F	36.4%	M	F

Calliope Hummingbird	62	23	39	35.2%	32.9%	36.8%
Broad-tailed Hummingbird	11	6	5	50.0%	66.7%	38.5%
Black-chinned Hummingbird	3	2	1	27.3%	28.6%	25.0%

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NOTE: Fred Bassett and Carl Rudeen (trainee) returned to the Rudeen Ranch on June 24 and August 9. Their encounters are detailed below:

(24 June 2006)

Breakdown of 67 hummingbirds banded at the Rudeen Ranch
(M = Male; F = Female)

SPECIES	RAW NUMBERS			PERCENTAGES
	Totals	Adult		% of Total	Adult
	67	M	F	100%	M	F

Calliope Hummingbird	42	9	33	62.7%	21.4%	78.6%
Broad-tailed Hummingbird	12	6	6	17.9%	50.0%	50.0%
Black-chinned Hummingbird	11	5	6	16.4%	45.5%	54.5%
HYBRID (Broad-tailed x Calliope)	2	2	0	3.0%	100%	0%

They also encountered 3 birds which had been banded in previous years, but not encountered on our earlier trip.

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(9 August 2006)

Breakdown of 110 hummingbirds banded at the Rudeen Ranch
(M = Male; F = Female)

SPECIES	RAW NUMBERS							PERCENTAGES
	Grand Total	Adult			Immature			% of Grand Total	Adult			Immature
	110	Totals	M	F	Totals	M	F	100%	% Total	M	F	% Total	M	F

Calliope Hummingbird	54	40	0	40	14	10	4	49.1%	74.1%	0.0%	100%	25.9%	71.4%	28.6%
Broad-tailed Hummingbird	24	14	0	14	10	4	6	21.8%	58.3%	0.0%	100%	41.7%	40.0%	60.0%
Black-chinned Hummingbird	16	6	0	6	10	5	5	14.5%	37.5%	0.0%	100%	62.5%	50.0%	50.0%
Rufous Hummingbird	16	2	0	2	14	5	9	14.5%	12.5%	0.0%	100%	87.5%	35.7%	64.3%

No previously banded birds were reported during this banding session.

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TOTAL of all birds banded in 2006
(Combining "new bands" from all trips)

SPECIES	RAW NUMBERS			PERCENTAGES
	Totals	Sex		% of Total	Sex
	488	M	F	100%	M	F

Calliope Hummingbird	369	146	223	75.6%	39.6%	60.4%
Broad-tailed Hummingbird	63	25	38	12.9%	39.7%	60.3%
Black-chinned Hummingbird	36	15	21	7.4%	41.7%	58.3%
Rufous Hummingbird	16	5	11	3.3%	31.3%	68.7%
Presumed HYBRID hummingbirds	4	4	0	0.8%	100%	0%

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