Loggerhead Shrike - This species was sighted only once during the Forest inven¬ 
tory. A family was observed on an abandoned farmland near the end of the 
breeding season. Breeding of this nationally threatened species has been con¬ 
firmed in the Marlborough Forest (OBBA). 
Nashville Warbler - A common inhabitant of the Forest which frequents sparse 
young thickets or forest edges during the breeding season. 
Yellow-rumped Warbler - One of the most common warblers in the Forest. 
Breeding individuals are typically found in coniferous or mixed woods 
dominated by Balsam Fir (Abies balsamea ) and White Spruce (Picea glauca). 
Black-throated Green Warbler - More often seen than heard, this common 
forest inhabitant frequents both coniferous and mixed forests. 
Northern Waterthrush - Typical of moist woodlands, this species was occas- 
sionally encountered during the Forest inventory. Breeding of the Northern 
Waterthrush was confirmed for the Marlborough Forest following the discovery 
of an active nest in the wooded swamp in 1988. 
Mourning Warbler - Rare. This species tends to inhabit the understory of dense 
deciduous thickets. Several territorial males were observed along O’Neil Road 
in 1988. 
Clay-coloured Sparrow - Observed only once during the inventory. A pair was 
encountered in an old field near O’Neil Road in the eastern section. This repre¬ 
sents the sole breeding record for this species in the Forest. 
Summary 
To date, 135 avian species have been recorded in the Marlborough Forest 
(Table 1). This survey has resulted in updated information on 22 species. Five 
new species have been recorded: Canada Goose, Black-throated Blue Warbler, 
Blackburnian Warbler, Rufous-sided Towhee and Clay-coloured Sparrow. The 
Yellow-bellied Flycatcher was upgraded from a possible breeder to a probable 
breeder. Breeding was confirmed for two formerly possible breeders (Yellow- 
bellied Sapsucker and Golden-crowned Kinglet) and 14 formerly probable 
breeders (Spotted Sandpiper, American Woodcock, Whip-poor-will, Least 
Flycatcher, Red-breasted Nuthatch, Cedar Waxwing, Warbling Vireo, Black & 
White Warbler, American Goldfinch, Black-throated Green Warbler, Chestnut¬ 
sided Warbler, Yellow-rumped Warbler, Ovenbird and Northern Waterthrush). 
In a region that is experiencing increasing pressure from the neighbouring 
human population, the Marlborough Forest merits protection. It is crucial that 
concerned individuals and various user groups (e.g., local naturalists’ clubs and 
members of the Rideau Trail Club) act as watchdogs over any modifications of 
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