COSEWIC assessment and status report on the band-tailed pigeon Patagioenas fasciata in Canada. : CW69-14/560-2021E-PDF

"This large, fruit-eating pigeon breeds in woodlands of western North and Central America, but in Canada nests only in southwestern British Columbia. Forest harvesting and encroaching urbanization have reduced the quality and extent of its breeding habitat. Most individuals overwinter in the western United States, where they are exposed to habitat loss and hunting and are threatened by an epizootic disease caused by the parasite Trichomonas gallinae. This pigeon's normal one-egg clutch limits its annual reproductive output. Aggregation at communal foraging areas, and at sites where minerals are ingested to offset dietary imbalances, increases its vulnerability to disturbance and disease. The Breeding Bird Survey has documented continuing long-term population declines in Canada, with an 11.5% decline over the last three generations. However, species-specific surveys at mineral sites suggest localized declines of about 40% over three generations, and this species may become Threatened if threats related to habitat loss throughout the year, and disease on US wintering grounds, cannot be managed effectively"--Reason for designation, page iii.

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