Tetrameres (Gynaecophila) williamsi sp. n. (Nematoda: Tetrameridae) from the White Ibis, Eudocimus albus, with Notes on Tetrameres (Tetrameres) grusi Shumakovich from the Sandhill Crane, Grus canadensis

1973 ◽  
Vol 59 (5) ◽  
pp. 788 ◽  
Author(s):  
Albert O. Bush ◽  
Danny B. Pence ◽  
Donald J. Forrester
Keyword(s):  
Grus Canadensis ◽  
Sandhill Crane ◽  
Eudocimus Albus ◽  
White Ibis

Irruptive White Ibis breeding is associated with use of freshwater crayfish in the coastal Everglades

The Condor ◽  
2021 ◽  
Vol 123 (1) ◽  
Author(s):  
Tasso C Cocoves ◽  
Mark I Cook ◽  
Jeffrey L Kline ◽  
Lori Oberhofer ◽  
Nathan J Dorn
Keyword(s):  
Prey Availability ◽  
Freshwater Crayfish ◽  
Seasonal Wetlands ◽  
Important Prey ◽  
Procambarus Alleni ◽  
Eudocimus Albus ◽  
Hydrologic Restoration ◽  
Prey Composition ◽  
White Ibis ◽  
Nesting Activity

Abstract As avian reproductive success is generally prey limited, identifying important prey types or sizes and understanding mechanisms governing prey availability are important objectives for avian conservation ecology. Irruptive White Ibis (Eudocimus albus) nesting at coastal colonies in the southern Everglades numbered over 100,000 nests in the 1930s. A century of drainage and altered hydrologic patterns reduced aquatic prey availability and eliminated large nesting events; nesting activity in recent decades has been typically less than 5% of historical peaks. Hydrologic restoration is expected to increase ibis nesting activity, but which prey types will support high nesting effort is less clear. In 2017 and 2018, we collected food boluses from White Ibis chicks at coastal colonies in Everglades National Park. We also monitored regional nesting activity from 1999 to 2018. In 2017, the region had 1,075 nests, typical of the past several decades; but in 2018, there were 30,420 nests, representing the highest recorded nesting activity in 87 yr. Prey composition varied between years; estuarine crabs dominated nestling boluses in 2017, while crayfish and fish were dominant prey in 2018. Crayfish, especially Procambarus alleni, were heavily exploited by ibis early in the 2018 breeding season, while fish were used more at the end. Crayfish abundances in wetlands near the colonies were higher prior to 2018, and more crayfish-producing short-hydroperiod wetlands remained available for ibis foraging in 2018. Our results support previous studies indicating that crayfish are important prey for breeding ibises and suggest that unprecedented, extensive flooding of seasonal wetlands promoted crayfish production and initiated the irruptive breeding in 2018. Our observations indicate that rehydration of the southern Everglades could restore ibis nesting activity at coastal colonies, but further investigations of hydrologic variation, crayfish production, and ibis foraging and nesting activity will be helpful to understand these dynamics and the importance of short-hydroperiod wetlands.

scholarly journals FIRST NESTING RECORDS OF THE AMERICAN AVOCET (Recurvirostra americana) AND WHITE IBIS (Eudocimus albus) AT LAGUNA OJO DE LIEBRE, BCS, MÉXICO

2014 ◽  
Vol 29 (1) ◽  
pp. 19
Author(s):  
V. Ayala -Pérez ◽  
R. Carmona ◽  
N. Arce ◽  
J. Rivera
Keyword(s):  
Eudocimus Albus ◽  
American Avocet ◽  
Recurvirostra Americana ◽  
White Ibis

Primer registro de anidación de Avoceta americana (Recurvirostra americana) e Ibis blanco (Eudocimus albus) en Laguna Ojo de Liebre, BCS, México El humedal de Guerrero Negro es uno de los sitios de mayor relevancia para las aves acuáticas en México y es un sitio importante para su reproducción. Esta nota describe los primeros registros de anidación de Avoceta americana (Recurvirostra americana) e Ibis blanco (Eudocimus albus) en este humedal, incrementando con esto a 24 el número de especies cuya anidación se ha registrado en la zona.

Host–Parasite Behavioral Interactions in a Recently Introduced, Whooping Crane Population

2015 ◽  
Vol 6 (1) ◽  
pp. 220-226 ◽  
Author(s):  
Richard S. King ◽  
Patrick C. McKann ◽  
Brian R. Gray ◽  
Michael S. Putnam
Keyword(s):  
Reproductive Performance ◽  
Black Flies ◽  
Behavioral Differences ◽  
Whooping Crane ◽  
Black Fly ◽  
Grus Canadensis ◽  
Sandhill Crane ◽  
Conservation History ◽  
Whooping Cranes ◽  
Sandhill Cranes

Abstract The whooping crane Grus americana has a long conservation history, but despite multiple attempts across North America, introduction success is lacking. Recently introduced, captively reared whooping cranes have had periods of poor reproductive performance in central Wisconsin that sometimes coincided with black fly (Diptera: Simuliidae) emergences. Sandhill crane Grus canadensis reproductive performance in central Wisconsin is approximately double that of whooping cranes. We used comfort behaviors as a measure of black fly harassment to infer whether behavioral differences existed between nesting sandhill cranes and nesting whooping cranes and between successful and unsuccessful whooping crane pairs. To further explore the interaction between black flies and incubating whooping cranes, we examined differences in behaviors between incubating birds and their off-nest mates. Compared to their off-nest mates, incubating whooping cranes exhibited elevated comfort behaviors, suggesting a bird at a nest may experience greater harassment from black flies. Sandhill cranes had elevated head-flicks over whooping cranes. Whooping cranes exhibited more head-rubs than sandhill cranes, and successful whooping crane pairs had elevated head-rubs over pairs that deserted their nests. Behavioral differences between sandhill cranes and whooping cranes as well as differences in reproductive performance, could be explained by exposure to local breeding conditions. Whereas sandhill cranes have nested in the area for hundreds, if not thousands, of years, whooping cranes were only recently introduced to the area. Behavioral differences between the species as well as those between successful and unsuccessful whooping crane pairs could also be explained by the effect of captive exposure, which could affect all whooping crane introductions.

Fish Crow Predation on Eggs of the White Ibis at Battery Island, North Carolina

The Auk ◽  
1986 ◽  
Vol 103 (3) ◽  
pp. 531-539 ◽  
Author(s):  
Mark A. Shields ◽  
James F. Parnell
Keyword(s):  
North Carolina ◽  
Predation Rate ◽  
Egg Predation ◽  
Nest Attentiveness ◽  
Eudocimus Albus ◽  
White Ibis

Abstract We studied predation by Fish Crows (Corvus ossifragus) on eggs of the White Ibis (Eudocimus albus) during the 1983 and 1984 nesting seasons at Battery Island, southeastern North Carolina. Crow predation accounted for the loss of 32% (n = 223) of ibis eggs in 1983 and 44% (n = 538) in 1984. Crows usually took all eggs in a clutch. An estimated 6 pairs of Fish Crows nested on the island each year. We believe these individuals were responsible for most egg loss. The predation rate of ibis clutches was highest in plots nearest crow nests and lowest in two plots that contained observation blinds. Results of experiments using simulated ibis nests suggested that crows were wary of the blinds. Predation declined with nest age, apparently due to increased nest attentiveness by adult ibises during the last week of incubation. The overall predation rate in 1984 was significantly higher than in 1983. Greater nest densities and less synchronous breeding by ibises in 1984 may have contributed to the higher predation rate. Ibis productivity was estimated at 1.22-1.30 fledglings per pair in 1983 and 1.05-1.12 in 1984. This level of reproduction appeared sufficient for maintenance of the population. Thus, egg predation by Fish Crows during our study did not appear to be a serious threat to the productivity of this White Ibis population.

scholarly journals Sandhill Crane, Grus canadensis, Nesting in the Yorkton Wetland Complex, Saskatchewan

2003 ◽  
Vol 117 (2) ◽  
pp. 224
Author(s):  
Ann M. Burke
Keyword(s):  
Open Water ◽  
Adult Mortality ◽  
Grus Canadensis ◽  
Scirpus Acutus ◽  
Sandhill Crane ◽  
Mate Change ◽  
Wetland Complex ◽  
Total Productivity ◽  
Sandhill Cranes ◽  
Hunting Mortality

Surveys for Sandhill Cranes (Grus canadensis) were conducted near Yorkton, Saskatchewan during the summers of 1995, 1996 and 1997. Seven nesting territories were identified and habitat measurements were taken at six nests. All nests were located in the emergent deep marsh zone of open water marshes within residual stands of Hardstem Bulrush (Scirpus acutus). Seven eggs were measured in four nests. Estimated hatching dates ranged from 20 May to 9 June. Total productivity for the three years was 0.80 chick per breeding pair (12 offspring fledged by 15 pairs). Individual pair productivity was impacted by disturbance, mate change, adult mortality, and predation. Hunting mortality may also impact the population.

Incubation Period of the Sandhill Crane, Grus canadensis tabida

The Auk ◽  
1950 ◽  
Vol 67 (4) ◽  
pp. 513-513
Author(s):  
Lawrence H. Walkinshaw
Keyword(s):  
Incubation Period ◽  
Grus Canadensis ◽  
Sandhill Crane ◽  
Grus Canadensis Tabida

Importance of Crayfish Prey to Nesting White Ibis (Eudocimus albus)

Waterbirds ◽  
2014 ◽  
Vol 37 (1) ◽  
pp. 19-29 ◽  
Author(s):  
Robin A. Boyle ◽  
Nathan J. Dorn ◽  
Mark I. Cook
Keyword(s):  
Eudocimus Albus ◽  
White Ibis

scholarly journals Mycobacterium avium SEROTYPE 1 INFECTION IN A SANDHILL CRANE (Grus canadensis)

1977 ◽  
Vol 13 (1) ◽  
pp. 40-42 ◽  
Author(s):  
CHARLES O. THOEN ◽  
ELMER M. HIMES ◽  
RICHARD E. BARRETT
Keyword(s):  
Mycobacterium Avium ◽  
Grus Canadensis ◽  
Sandhill Crane ◽  
Serotype 1
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