Accelerating declines of North America’s shorebirds signal the need for urgent conservation action

Paul A Smith; Adam C Smith; Brad Andres; Charles M Francis; Brian Harrington; Christian Friis; R I Guy Morrison; Julie Paquet; Brad Winn; Stephen Brown

doi:10.1093/ornithapp/duad003

journal article Open Access Feb 08, 2023

Accelerating declines of North America’s shorebirds signal the need for urgent conservation action

Paul A Smith Adam C Smith Brad Andres Charles M Francis Brian Harrington Christian Friis R I Guy Morrison Julie Paquet Brad Winn Stephen Brown

The Condor Vol. 125 No. 2 · Oxford University Press (OUP)

View at Publisher Save 10.1093/ornithapp/duad003

Abstract

Abstract
Shorebirds are declining to a greater extent than many other avian taxa around the world. In North America, shorebirds, along with aerial insectivores and grassland birds, have some of the highest proportions of declining species of any group. Here, we apply a new hierarchical Bayesian model to analyze shorebird migration monitoring data from across North America, from 1980 to 2019, and present the most recent available estimates of trends for 28 species. Point estimates for survey-wide trends in abundance were negative for 26 of 28 species (93%). Despite challenges with low precision associated with migration count data, trends for 19 species had 95% credible intervals that were entirely negative. More than half of the species were estimated to have lost &gt;50% of their abundance. Furthermore, estimated rates of decline have accelerated during the last three generations for most species. Point estimates of trend were more negative for 18 species (64%) during the most recent three-generation period in comparison to the previous three-generation period. Many species now exceed international criteria for threatened species listing. The analytic approach used here allows us to model regional variation in trends, although survey coverage and strength of inference were greatest in the eastern portions of North America (east of 100°W). We found the greatest declines at staging sites along the Atlantic Coast from North Carolina to Nova Scotia, and lesser declines along the Gulf Coast and in the midcontinental United States. The declines in shorebird populations reported here are worrisome and signal the urgent need for conservation action. In addition, it would be beneficial to validate these results through the collection and analysis of complementary data, and to initiate demographic studies throughout the annual cycle to determine where and when declines are most likely to originate. This improved information will allow for the development of more targeted efforts to reverse declines through conservation action.

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Accelerating declines of North America’s shorebirds signal the need for urgent conservation action

Paul A Smith, Adam C Smith · 2023

The Condor

Metrics

69

Citations

79

References

Details

Published: Feb 08, 2023
Vol/Issue: 125(2)
License: View

Authors

P

Paul A Smith

Wildlife Research Division, Environment and Climate Change Canada , Ottawa, Ontario , Canada

A

Adam C Smith

Canadian Wildlife Service, Environment and Climate Change Canada , Ottawa, Ontario , Canada

B

Brad Andres

United States Fish and Wildlife Service, Migratory Bird Program , Lakewood, Colorado , USA

C

Charles M Francis

Canadian Wildlife Service, Environment and Climate Change Canada , Ottawa, Ontario , Canada

B

Brian Harrington

Manomet Inc ., Manomet, Massachusetts , USA

C

Christian Friis

Canadian Wildlife Service, Environment and Climate Change Canada , Toronto, Ontario , Canada

R

R I Guy Morrison

Wildlife Research Division, Environment and Climate Change Canada , Ottawa, Ontario , Canada

J

Julie Paquet

Canadian Wildlife Service, Environment and Climate Change Canada , Sackville, New Brunswick , Canada

B

Brad Winn

Manomet Inc ., Manomet, Massachusetts , USA

S

Stephen Brown

Manomet Inc ., Manomet, Massachusetts , USA

Funding

Natural Sciences and Engineering Research Council of Canada

Environment and Climate Change Canada

National Fish and Wildlife Foundation

Bobolink Foundation

Knobloch Family Foundation

BAND Foundation

R. Howard Dobbs, Jr. Foundation

Nuttall Ornithological Club

Wader Quest

Cite This Article

Paul A Smith, Adam C Smith, Brad Andres, et al. (2023). Accelerating declines of North America’s shorebirds signal the need for urgent conservation action. The Condor, 125(2). https://doi.org/10.1093/ornithapp/duad003

Accelerating declines of North America’s shorebirds signal the need for urgent conservation action

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