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The Waterthrush Saga: An Observation Of A Vocally And Visually Ambiguous Waterthrush In Southwestern Ontario, Michael J. Kirchin, Alessandra A. Kite, Kiah R. Jasper, Samreen Munim Nov 2025

The Waterthrush Saga: An Observation Of A Vocally And Visually Ambiguous Waterthrush In Southwestern Ontario, Michael J. Kirchin, Alessandra A. Kite, Kiah R. Jasper, Samreen Munim

Ontario Birds

No abstract provided.


Predator Exclusion Grids Protect Common Terns From Avian Nest Predators At Presqu’Ile Provincial Park, Lake Ontario, Jennifer M. Arnold, Stephen A. Oswald, Donald J. Tyerman, Michael J. Barker Nov 2025

Predator Exclusion Grids Protect Common Terns From Avian Nest Predators At Presqu’Ile Provincial Park, Lake Ontario, Jennifer M. Arnold, Stephen A. Oswald, Donald J. Tyerman, Michael J. Barker

Ontario Birds

Common Tern (Sterna hirundo) breeding populations in inland areas of North America have experienced significant declines, particularly in the Canadian waters of the lower Great Lakes. Once home to two-thirds of the Great Lakes population, Presqu’ile Provincial Park maintained only a small breeding colony of Common Terns from the 1970s to the early 2010s. In 2008, a research program was started to understand the population status of this colony. This involved close collaboration between faculty at Penn State University and Ontario Parks staff, and identified poor reproductive success at this site. Although many factors contributed to this poor reproductive success …


Cover, Barry Kent Mackay Nov 2025

Cover, Barry Kent Mackay

Ontario Birds

No abstract provided.


Table Of Contents, Ontario Field Ornithologists Nov 2025

Table Of Contents, Ontario Field Ornithologists

Ontario Birds

No abstract provided.


Full Issue, Ontario Field Ornithologists Nov 2025

Full Issue, Ontario Field Ornithologists

Ontario Birds

No abstract provided.


Cover, Barry Kent Mackay Nov 2025

Cover, Barry Kent Mackay

Ontario Birds

No abstract provided.


Table Of Contents, Ontario Field Ornithologists Nov 2025

Table Of Contents, Ontario Field Ornithologists

Ontario Birds

No abstract provided.


Full Issue, Ontario Field Ornithologists Nov 2025

Full Issue, Ontario Field Ornithologists

Ontario Birds

No abstract provided.


Spring Migration Phenology, Abundance And Behaviour Of Little And Bonaparte’S Gulls At Oshawa Second Marsh, Lake Ontario, Ontario, 1992–2022, Tyler Hoar, D.V. Chip Weseloh, David J. Moore Nov 2025

Spring Migration Phenology, Abundance And Behaviour Of Little And Bonaparte’S Gulls At Oshawa Second Marsh, Lake Ontario, Ontario, 1992–2022, Tyler Hoar, D.V. Chip Weseloh, David J. Moore

Ontario Birds

The Little Gull (Hydrocoloeus minutus) is a rare gull in most of North America; however, in spring it is relatively numerous at several sites in Ontario, as it migrates with its much more numerous relative, the Bonaparte’s Gull (Chroicocephalus philadelphia). The primary objective of this study was to document the spring migration phenology, abundance and behaviour of the Little Gull and the Bonaparte’s Gull at Oshawa Second Marsh (OSM), Ontario. Pursuit flights, roosting flights and migration departures by Little Gulls are also reported. The study took place from late March to late May, 1992–2022, at OSM. This site consistently hosted …


Table Of Contents, Ontario Field Ornithologists Nov 2025

Table Of Contents, Ontario Field Ornithologists

Ontario Birds

No abstract provided.


Extralimital Records Of The Canada Jay In The Greater Toronto Area 1825–2022, Glenn Coady Nov 2025

Extralimital Records Of The Canada Jay In The Greater Toronto Area 1825–2022, Glenn Coady

Ontario Birds

No abstract provided.


Full Issue, Ontario Field Ornithologists Nov 2025

Full Issue, Ontario Field Ornithologists

Ontario Birds

No abstract provided.


Cover, Barry Kent Mackay Nov 2025

Cover, Barry Kent Mackay

Ontario Birds

No abstract provided.


Is The Double-Crested Cormorant A Likely Disperser Of The Japanese Chaff-Flower To The Lake Erie Islands, Ontario?, Ronald I. Orenstein Nov 2025

Is The Double-Crested Cormorant A Likely Disperser Of The Japanese Chaff-Flower To The Lake Erie Islands, Ontario?, Ronald I. Orenstein

Ontario Birds

No abstract provided.


Distinguished Ornithologist 2022: Erica Nol, Douglas C. Tozer Nov 2025

Distinguished Ornithologist 2022: Erica Nol, Douglas C. Tozer

Ontario Birds

No abstract provided.


Table Of Contents, Ontario Field Ornithologists Nov 2025

Table Of Contents, Ontario Field Ornithologists

Ontario Birds

No abstract provided.


The Northward Expansion Of The Black-Bellied Whistling-Duck And First Records For Regional Municipality Of Niagara, Kayo J. Roy Nov 2025

The Northward Expansion Of The Black-Bellied Whistling-Duck And First Records For Regional Municipality Of Niagara, Kayo J. Roy

Ontario Birds

No abstract provided.


Cover, Barry Kent Mackay Nov 2025

Cover, Barry Kent Mackay

Ontario Birds

No abstract provided.


Full Issue, Ontario Field Ornithologists Nov 2025

Full Issue, Ontario Field Ornithologists

Ontario Birds

No abstract provided.


In Memoriam: Harry G. Lumsden, Kenneth F. Abraham Nov 2025

In Memoriam: Harry G. Lumsden, Kenneth F. Abraham

Ontario Birds

No abstract provided.


Table Of Contents, Ontario Field Ornithologists Nov 2025

Table Of Contents, Ontario Field Ornithologists

Ontario Birds

No abstract provided.


Cover, Harry Lumsden Nov 2025

Cover, Harry Lumsden

Ontario Birds

No abstract provided.


Full Issue, Ontario Field Ornithologists Nov 2025

Full Issue, Ontario Field Ornithologists

Ontario Birds

No abstract provided.


The University Of Guelph’S Arboretum Winter Bird Count, 1980-2022, Brandon P.M. Edwards, Alan P. Watson, Chris G. Earley Nov 2025

The University Of Guelph’S Arboretum Winter Bird Count, 1980-2022, Brandon P.M. Edwards, Alan P. Watson, Chris G. Earley

Ontario Birds

No abstract provided.


A Possible Canvasback X Ruddy Duck Hybrid, Brandon P.M. Edwards, Mike Bouman Nov 2025

A Possible Canvasback X Ruddy Duck Hybrid, Brandon P.M. Edwards, Mike Bouman

Ontario Birds

No abstract provided.


Great Egrets Nesting At Presqu’Ile Provincial Park, 1999-2021: Abundance And Interactions With Cormorants And Raccoons, D.V. Chip Weseloh, David J. Moore Nov 2025

Great Egrets Nesting At Presqu’Ile Provincial Park, 1999-2021: Abundance And Interactions With Cormorants And Raccoons, D.V. Chip Weseloh, David J. Moore

Ontario Birds

No abstract provided.


Peculiarities In The Appearance And Moult Of Long-Tailed Duck, Peter S. Burke, Tim Lucas, Kevin A. Mclaughlin Nov 2025

Peculiarities In The Appearance And Moult Of Long-Tailed Duck, Peter S. Burke, Tim Lucas, Kevin A. Mclaughlin

Ontario Birds

This paper reviews the literature on moults and resulting appearances of the Long-tailed Duck (Clangula hyemalis; LTDU), focusing on the high degree of plumage variation observed in this species, which is unique among ducks. In addition to exhibiting three visibly different plumages in its first year of life, and two visibly different plumages every year thereafter, the LTDU also shows a high variation among individuals, due, at least in part, to individual variation in the prolongation of each moult. This has led to confusion for those describing LTDU plumage and moult patterns in the past. Previous (and some erroneous) hypotheses …


Table Of Contents, Ontario Field Ornithologists Nov 2025

Table Of Contents, Ontario Field Ornithologists

Ontario Birds

No abstract provided.


Full Issue, Ontario Field Ornithologists Nov 2025

Full Issue, Ontario Field Ornithologists

Ontario Birds

No abstract provided.


Cover, Peter S. Burke Nov 2025

Cover, Peter S. Burke

Ontario Birds

No abstract provided.