Hi folks,

I've unsuccessfully (?) tried sending this a couple of times, so if it =
kicks through and you receive more than one copy of it, I apologize.

Sometime while I was gone on vacation a week or two ago, I received the =
May 1996 issue of the Condor (Volume 98 Number 2), published quarterly =
by the Cooper Ornithological Society. Enjoy:

Jon. Anderson
Olympia, Washington
festuca at olywa.net


Nest Initiation and Clutch Size of Great Blue Herons on the Mississippi =
River in Relation to the 1993 Flood. Thomas W Custer, Randy K Hines and =
Christine M Custer. pp 181-188. Herons in flood area initiated nesting =
2 weeks later and had smaller clutches than those in less flooded areas =
to north.

Status and Trends of Loon Populations Summering in Alaska, 1971-1993. =
Deborah J Groves, Bruce Conant, Rodney J King, John J Hodges and James G =
King. pp 189-195. Populations of Pacific, Common and Yellow-throated =
Loons did not change significantly between 1977 and 1993, whereas =
Red-throated Loons declined by 53%; data from Alaska-Yukon Waterfowl =
Breeding Population Survey.

Seasonal Variation in Diurnal and Nocturnal Distributions of Nonbreeding =
Shorebirds at North Humboldt Bay, California. Sarah L Dodd and Mark A =
Colwell. pp 196-207. Nocturnal counts done with red-filtered spotlight.

Breeding Biology of the Dolphin Gull at Punta Tombo, Argentina. Pablo =
Yorio, P Dee Boersma and Scott Swann. pp 208-215. 'The breeding biology =
of the Dolphin Gull appears to be largely influenced by their =
specialized scavenging habits and vulnerability to predation.' These =
birds specialize on southern sea lion excrement and in picking up scraps =
of food dropped by Magellanic Penguins and Imperial Cormorants. Also =
some feeding in intertidal zone, and stealing of cormorant and Kelp Gull =
eggs.

Molt of Cory's Shearwater During the Breeding Season. LR Monteiro and RW =
Furness. pp 216-221. Complete annual molt overlaps considerably with =
breeding season; this has not been previously described in a pelagic and =
highly migratory seabird. Suggests that timing of molt in the species =
is dictated by intrinsic rhythms acquired by evolution rather than =
imposed by nutritional/energetic constraints.

Serial Descendant Primary Molt or Staffelmauser in Black-crowned =
Night-Herons. Gary W Shugart and Sievert Rohwer. pp 222-233. First molt =
progressed sequentially as a single wave from P1 through P7 or P8, then =
skipped to P10 ... before the skipped primaries were molted.

The Effect of Supplemental Food on Body Condition and the Timing of =
Reproduction in a Cooperative Breeder, the Florida Scrub-Jay. Stephan J =
Schoech. pp 234-244. Supplemented female breeders initiated clutches =
earlier, produced larger clutches than unsupplemented birds, had higher =
levels of body lipids. Equal frequencies of control and supplemented =
non-breeders became breeders.

Aggression in White-crowned Sparrows: Effects of Distance from Cover and =
Group Size. Robert Slotow. pp 245-252. Study from Santa Barbara, CA =
For a given group size, interaction rate was higher close to cover, =
suggesting that sparrows perceived such locations to be more valuable =
(safer).

Unsuitability of the House Finch as a Host of the Brown-headed Cowbird. =
Daniel R Kozlovic, Richard W Knapton and Jon C Barlow. pp 253-258. In =
Ontario, cowbirds parasitized 24.4% of 406 finch nests observed. =
Hatching success of cowbird eggs was 84.8%, but no cowbird was reared. =
Lack of cowbird survival appeared to be result of an inappropriate diet.

Differential Reproductive Success of Brown-headed Cowbirds with Northern =
Cardinals and Three Other Hosts. David M Scott and Robert E Lemon. pp =
259-271. Another study from Ontario; cowbirds present in only 11 of 63 =
Cardinal broods, but in 62 of 93 broods fledged by Song and Chipping =
Sparrows and Yellow Warbler.

The Effect of Magpie Breeding Density and Synchrony on Brood Parasitism =
by Great Spotted Cuckoos. JG Martinez, M Soler and JJ Soler. pp =
272-278. Study of interactions in the Hoya de Guadix near Granada, =
Spain; Increased proximity to other nests and specially laying synchrony =
both reduced probability of parasitization.

Morphometry of the Digestive Tracts of Some Passerine Birds. RE =
Ricklefs. pp 279-292. Insectivores were distinguished from species with =
mixed diets by having smaller but heavier-walled stomachs and smaller =
intestines. Fruit eaters were distinguished from seed-eaters primarily =
by having thicker-walled stomachs.

Complete Migration Cycle of Golden Eagles Breeding in Northern Quebec. =
Serge Brodeur, Robert De'carie, David M Bird and Mark Fuller. pp =
293-299. Satellite tracking confirms some GEagles wintering in Eastern =
USA birds that nest on the east coast of Hudson's Bay.

Paternal Care in the Cooperatively Polyandrous Galapagos Hawk. Linda S =
Delay, John Faaborg, Jenny Naranjo, Sara M Paz, Tjitte De Vries and =
Patricia G Parker. pp 300-311. ".. the simple rule for paternal care in =
the Galapagos Hawk is that if a male is a group member, he will copulate =
with the female, have some probability to fertilize the eggs, and =
provide care for young produced at the nest." A rule we can all live =
by?

Aspects of the Life History and Foraging Ecology of the Endangered =
Akaipolaau. C John Ralph and Steven G Fancy. pp 312-321. A good =
general biology of this specialist of the old-growth koa and ohia forest =
on the island of Hawaii.

Brown Noddy Chick Predation by Great Frigatebirds in the Northwestern =
Hawaiian Islands. Jennifer Lynn Megyesi and Curtice R Griffin. pp =
322-327. Adult female frigatebirds accounted for 64% of predatory =
behaviors on Brown Noddy chicks on Tern Is., Fench Frigate Shoals; =
frigatebird predation likely accounted for 95% of mortality observed in =
Brown Noddy chicks less than 24 days of age.

Causes of Hatching Failure in the Pied Flycatcher. Jaime Potti and =
Santiago Merino. pp 328-336. Hatchability decreased in small eggs; =
decrease in egg hatchability with increasing clutch size - study in =
central Spain.

Bird Communities of Northern Forests: Patterns of Diversity and =
Abundance. Mary F Willson and Tallchief A Comet. pp 337-349. Censuses =
of diurnal bird communities in SE Alaska and adjacent Canada; little =
evidence for a general trend toward greater diversity in bird =
communities of western and northern deciduous forests.

Bird Communities of Northern Forests: Ecological Correlates of Diversity =
and Abundance in the Understory. Mary F Willson and Tallchief A Comet. =
pp 350-362. Bird community of the understory in far northern forests is =
markedly more diverse and abundant in deciduous than coniferous forests. =
=20

Build-up of Red Blood Cells in Refuelling Bar-tailed Godwits in Relation =
to Individual Migratory Quality. Theunis Piersma, Jan M Everaarts and =
Joop Jukema. pp 363-370. Study from May staging area in the Wadden Sea, =
where birds recover from a 4,000-5,000 km flight from West African =
wintering areas and refuel in preparation for a flight of similar length =
toward arctic Siberian breeding grounds.

Geographic Variation in Metabolic Seasonal Acclimatization in House =
Finches. Timothy P O'Connor. pp 371-381. Finches from Michigan and =
Colorado demonstrate metabolic seasonal acclimatization that is not =
found in California birds - seasonal changes in fat stores and catabolic =
capacity.

The Influence of Weather, Geography, and Habitat on Migrating Raptors on =
Cape May Peninsula. Lawrence J Niles, Joanna Burger and Kathleen E =
Clark. pp 382-394. Habitat type strongly associated with most species' =
altitude and density, birds generally occurred in higher densities and =
lower altitudes above habitats similar to those used in breeding or =
wintering seasons; authors suggest that this is due to need for suitable =
foraging sites.

A Ten-year Study of the Stopover Patterns of Migratory Passerines During =
Fall Migration on Appledore Island, Maine. Sara R Morris, David W Holmes =
and Milo E Richmond. pp 395-409. Most observed stopovers were less than =
four days, and individuals experienced significant increases in mass and =
fat class during stopovers. =20

Sperm Transfer in the Ade'lie Penguin. FM Hunter, LS Davis and GD =
Miller. pp 410-413. Study from Cape Bird, Ross Is, Antarctica noted =
that cloacal contact is not a good indicator of sperm transfer and that =
most behaviorally successful copulations that fail to result in sperm =
transfer are due to the male failing either to produce an ejaculate or =
to accurately position the ejaculate on the female's cloaca.

Lack of Sperm Storage by Female Migrants and the Significance of =
Copulations En Route. James V Briskie. pp 414-417. Collected 6 female =
Tennessee Warblers and 3 female Blackpoll Warblers during last week of =
May at Delta Marsh, Manitoba and salvaged 1 Black-and-White Warbler and =
1 Ovenbird from window kills in Winnipeg (all south of breeding area), =
and lavaged sperm from cloaca. Sperm storage tubules were small and not =
numerous, and no spermatozoa were observed.

Nuptial Vocalizations of Male Least Seedsnipe: Structure and =
Evolutionary Significance. Edward H Miller. pp 418-422. Recorded NW of =
Rio Gallegos, Argentina and compared with Common Snipe from Alaska, =
Yukon, B.C., Manitoba, Iceland and Russia.

Florida Scrub-Jay Forages on Back of White-tailed Deer. John W =
Fitzpatrick and Glen E Woolfenden. pp 422-423. Picking ticks?

The Use of Thermal Refugia by Two Small Desert Birds. Blair O Wolf, =
Kenneth M Wooden and Glenn E Walsberg. pp 424-428. Verdin and =
Black-tailed Gnatcatcher in Goldfield Mtns, Arizona, rested in the shade =
of Paloverde trees - temperatures measurements provided.

Egg Laying in Dusky Flycatchers and White-crowned Sparrows. Suzanne D =
Oppenheimer, Maria E Pereyra and Martin L Morton. pp 428-430. Tioga =
Pass, Mono Co., California observations of laying times: Mean hour of =
laying for flycatcher was 12:06 and for the sparrow was 05:44 PST.=20

Egg-capping and Eggshell Removal by Western and Semipalmated Sandpipers. =
Brett K Sandercock. pp 431-433. Despite having precocial young that =
leave the nest soon after hatching, many shorebirds will remove shells =
of hatched eggs from the nest. Egg-capping is when shell fragments from =
a hatching egg become affixed to a later-hatching egg, forming a =
double-shell layer that the pipping chick cannot break. 2 of 248 eggs =
in 2 of 66 nests of WESA and 1 of 238 eggs in 1 of 62 nests of SESA near =
Nome, Alaska had 'capped' eggs.

Nesting Phenology of Kittlitz' Murrelet. Robert H Day. pp 433-437. =
Survey of literature and unpubished reports. Nesting phenology is =
clearly earlier in southern populations than in northern ones.

Geographic Variation in Size of Female Wild Rock Doves. Richard F =
Johnston. pp 437-439. Study of museum specimens.

Commentary: On Breeding Performance, Colony Growth and Habitat Selection =
in Buff-necked Ibis. Thierry Boulinier. pp 440-441. A critique of =
Donazar et al.'s 1994 paper in the Condor: Breeding performance in =
relation to nest-site substratum in Buff-necked Ibis population in =
Patagonia.

Historical Perspectives: Bird Migration: Methodologies and Major =
Research Trajectories (1945-19950. Sidney A Gauthreaux Jr. pp 442-453. =
A commentary on descriptive studies - quoted Lorenz's referral to the =
trend away from descriptive studies as the "fashionable fallacy of =
dispensing with description."

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