Distribution and migration chronology of Eastern population sandhill cranes

Fronczak, David L.; Andersen, David E.; Hanna, Everett E.; Cooper, Thomas R.

doi:10.1002/jwmg.21272

Cited by 12 publications

(23 citation statements)

References 15 publications

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“…Because age ratios are an index to recruitment (Cowardin and Blohm 1992), it is important to consider other factors that may affect age ratios, including spatial and temporal variation. Wildlife managers perform age-ratio surveys at fall staging areas, and arrival and departure dates and total days spent at those staging areas vary among EP cranes (Fronczak et al 2017). The proportion of juveniles at staging areas may increase with time throughout the migratory period (Lovvorn and Kirkpatrick 1982), but managers do not know how arrival and duration of stay at these areas varies among age classes.…”

Section: Introductionmentioning

confidence: 99%

“…Surveying age ratios at fall staging areas, where EP cranes accumulate in large numbers, is more efficient and cost effective. There are numerous fall staging areas throughout migration for EP cranes (Fronczak et al 2017;R. Pierce, U.S.…”

Section: Introductionmentioning

confidence: 99%

“…Pierce, U.S. Fish and Wildlife Service, personal communication) and the Kankakee River valley (KRV) in northwestern Indiana and the southcentral counties of Michigan (Barry, Calhoun, Eaton, and Kalamazoo counties; hereafter, SCMI) are identified as key areas for EP cranes (Tacha et al 1994;Castrale and Bergens 1999;Fronczak et al 2017).…”

Section: Introductionmentioning

confidence: 99%

“…The KRV is a useful area for age-ratio surveys due to the concentration of EP cranes and the assumption that the KRV is a bottleneck for EP cranes throughout their summer range (Lovvorn and Kirkpatrick 1982;Castrale and Bergens 1999). Fronczak et al (2017) found that a majority of platform transmitting terminal (PTT)-marked EP cranes moved through the KRV at least one time during fall migration, but also found a proportion of EP cranes breeding in Ontario and Michigan that staged in the SCMI without moving through the KRV. Fronczak et al (2017) also found that EP cranes had a higher fidelity and staged longer during fall migration at both the KRV and SCMI than at any other fall staging area within the EP crane range.…”

Section: Introductionmentioning

confidence: 99%

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Fall Age-Ratio Survey Design for Eastern Population Greater Sandhill Cranes

Fronczak

Rigby

2019

Journal of Fish and Wildlife Management

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For migratory birds, wildlife managers can use the recruitment rate of young into an adult population to model population dynamics, manage harvest, or evaluate habitat. Few recruitment estimates exist for Eastern Population greater sandhill cranes Antigone canadensis tabida, and estimates are outdated and local in scale. Wildlife managers can use age ratios as an index to recruitment, and surveying at fall staging areas is efficient and cost effective. We created a systematic survey design for surveying eastern population crane age ratios in the Kankakee River valley (2013)(2014)(2015) in northwestern Indiana and the south-central counties of Michigan (2014Michigan ( -2015. Using logistic regression, we investigated factors that may cause spatial and temporal variation in age ratios, including flock size, timing within season, state, year, random vs. incidental survey routes, and observer. We stratified our selection of survey routes using a core area of high crane abundance, but do not recommend stratifying due to the added complexity and low utility. Observers determined the age of 53,371 cranes and found that the proportion of juveniles in Eastern Population crane flocks (p ¼ 0.113, 95% CI: 0.105 -0.122) was similar to previous estimates for the population. Proportion of juveniles was greater for south-central Michigan than for the Kankakee River valley, decreased with flock size, increased with lateness in the season, and varied among observers. Our design accounted for both ecological sources of variation in age ratios as well as nuisance variation. We recommend that future surveys use our design as part of a monitoring plan for Eastern Population cranes to support harvest management of the population and ensure that future survey results are comparable across years.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Fall Age-Ratio Survey Design for Eastern Population Greater Sandhill Cranes

Fronczak

Rigby

2019

Journal of Fish and Wildlife Management

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“…After young of the year have fledged, family groups use a larger area, including autumn staging areas, which generally provide abundant food resources in preparation for migration, and then Cranes in most populations move considerable distances between breeding and non-breeding (i.e. wintering) areas (Krapu et al 2011, Fronczak et al 2017, Wolfson et al 2017.…”

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confidence: 99%

Juvenile Sandhill Cranes exhibit wider ranging and more exploratory movements than adults during the breeding season

Wolfson

Fieberg

Andersen

2019

Ibis

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Sandhill Cranes Antigone canadensis exhibit delayed sexual maturity and breeding, and therefore juvenile Cranes searching for suitable territories to occupy have different ecological constraints on movements than adults, which must defend a territory and raise young. We used fine‐scale GPS telemetry data to characterize and compare movements of adult and juvenile Cranes near the boundary between two populations in Minnesota, USA, from arrival on natal areas in the spring until staging prior to autumn migration. Juvenile and adult Cranes had marked differences in movement patterns throughout the breeding season. Juveniles were more likely than adults to display long‐distance movements: they revisited areas less frequently throughout the breeding season and they had lower average residence times.

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Breeding expansion of sandhill cranes in Quebec

et al. 2022

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Sandhill cranes (Antigone canadensis) were broadly extirpated from much of their historical range in North America at the beginning of the twentieth century. Various conservationrelated legislation, such as the United States Migratory Bird Treaty Act, have assisted with population recovery. The eastern population of sandhill cranes has been growing rapidly since the 1980s and is thought to have expanded its geographic range to Quebec, Canada. Understanding the colonization and habitat use by the species in previously unoccupied breeding areas is necessary to develop and apply management measures. Using a dynamic occupancy modeling approach, we investigated the recent colonization and extirpation patterns of sandhill cranes in Quebec from 2004-2019. We combined data from 3 data sets (helicopter surveys, breeding bird atlas surveys, and eBird) to increase the spatial coverage and the number of species occurrence records while accounting for imperfect detection probability. Detection probability was highest for the helicopter survey (0.70), whereas the 2 other data sets had relatively low detection levels (0.10-0.26). Based on a simulation study, we found that excluding the eBird data from the analysis produced more biased estimates than excluding the atlas and helicopter survey data sets. Throughout the study, sandhill cranes seemed to have completed their colonization of western Quebec and only recently started to nest in eastern areas. Initial occupancy increased with wetland cover and colonization probability increased weakly with the cover of agricultural areas, suggesting that in our study area sandhill cranes rely essentially on natural wetlands during the breeding season.

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Distribution and migration chronology of Eastern population sandhill cranes

Cited by 12 publications

References 15 publications

Fall Age-Ratio Survey Design for Eastern Population Greater Sandhill Cranes

Fall Age-Ratio Survey Design for Eastern Population Greater Sandhill Cranes

Juvenile Sandhill Cranes exhibit wider ranging and more exploratory movements than adults during the breeding season

Breeding expansion of sandhill cranes in Quebec

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