Baltimore Oriole (Icterus galbula)

Rising, James D.; Flood, Nancy J.; Poole, A.; Gill, F.

doi:10.2173/bna.balori.01.1

Cited by 7 publications

(3 citation statements)

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“…The most frequent visitor (one of the three most effective in removing fruit and one of the top species in ESC, Table ) of P. leucocephalus is a migratory species, the Baltimore oriole. This bird's seasonal visit only overlaps with part of the fruiting season of P. leucocephalus (this oriole is present in the area approximately from mid‐September to mid‐April, Rising & Flood, ) and may undertake longer‐distance movements than most other visitors. It would be worthwhile assessing its role in seed dispersal.…”

Section: Discussionmentioning

confidence: 99%

Patterns of frugivory in the columnar cactusPilosocereusleucocephalus

Vázquez‐Castillo

Miranda‐Jácome

Inzunza

2019

Ecology and Evolution

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In the frugivory networks of many arid and semi‐arid Mesoamerican ecosystems, columnar cacti act as keystone species that produce fruits with a high content of water and nutrients attractive to numerous vertebrates. The aim of this investigation was to assess the fruit removal patterns of two guilds of frugivores on the fruits of the woolly torch Pilosocereus leucocephalus. We assessed fruit pulp removal in two ways: by estimating the consumption of seeds given the amount of pulp removed per visit and by estimating the percentage of pulp removal over time. We put exclosures on unripe, intact fruits to keep frugivores from removing material. Once ripe, we removed the exclosures and tracked animal visitation of 69 fruits using camera traps. We obtained a total of 2,162 hr of footage (14:47 hours of them with effective pulp removal). The highest number of visitors is that of diurnal species (n = 12, all birds) versus only four nocturnal (three bats, one rodent). The most effective species in pulp removal are birds. Bats play a modest role in frugivory of this cactus. The significance of this work is twofold: (a) birds and bats consume the fruit pulp of this cactus and likely disperse its seeds, and (b) although bats rank high in pulp removal effectiveness, birds as a guild far outweigh their importance in this system, as they are not only more frequent but also remove more pulp and seeds. Both groups are known to be important in cacti seed dispersal, and our findings are essential in understanding the population dynamics of the woolly torch and in elucidating its seed dispersal ecology.

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Section: Discussionmentioning

confidence: 99%

Patterns of frugivory in the columnar cactusPilosocereusleucocephalus

Vázquez‐Castillo

Miranda‐Jácome

Inzunza

2019

Ecology and Evolution

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“…5 Known to forage opportunistically 6 , Baltimore orioles fed on the post-egg stages of the tent caterpillar and fed them to their young 4 , despite a diet in the ridge forest that otherwise consisted predominantly of midges and other dipterans. 7,8 elsewhere, Baltimore orioles had been determined to take predominantly lepidopteran larvae and pupae 6,9 , including the forest Tent Caterpillar. 10 observations in upstate New York had previously revealed a functional response 11 by Baltimore orioles to an outbreak of this tent caterpillar.…”

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confidence: 99%

Changes in Nesting Density of Baltimore Orioles (1976-1995) and Other Species in the Dune- Ridge Forest, Delta Marsh, MB: Response to an Outbreak of Forest Tent Caterpillar?

Sealy¹

2018

bluejay

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“…At the site scale, however, only one species experienced significant change, a decline in the probability of occupancy for the Baltimore Oriole (Icterus galbula). This species is a foliage gleaner and tends to be associated with edge habitats and open woodlands (Rising and Flood 1998) and is considered relatively stable within the Driftless Area (Table 6; . Another species, the Red-headed Woodpecker, a bark gleaner sensitive to loss of open woodlands was not detected at any of our count stations; however, it was not detected in any significant abundance during the 1995-96 surveys.…”

Section: Avian Surveysmentioning

confidence: 99%

Using changes in land use and land cover to predict avian species occurrences at

LeBrun

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Open-canopy oak forests not cleared for agriculture rapidly shift to closed-canopy forests. These changes have produced feedback loops that increasingly favor shade-tolerant tree species over fire-adapted species. Studies observing changes from oak-to mapledominated forests have found decreased avian species richness and abundance. The primary goal of this study was to examine changes in forest bird communities over a relatively short period of time, and assess these changes in light of habitat alterations during this same period. We specifically used recent survey data to predict forest bird occurrences. Point counts were conducted during the breeding season in 2006-07 at 49 survey stations that had been surveyed in 1995-96. Local-habitat variables were measured within 50-m and land cover and land use variables were digitized (200-m, 1-km, and 6-km) for each period. Single-species logistic and autologistic models were created using the 1995-96 dataset. Using the 2006-07 dataset, models were evaluated using receiver operating characteristic (ROC) curves. Predictive models performed best for species associated with open habitats and dense understories, suggesting that we have a relatively good understanding of their habitat requirements. The inclusion of variables measured at relatively fine scales suggests that relying on remotely sensed imagery alone will not be sufficient to make predictions on species occurrences at the scales we studied.

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Baltimore Oriole (Icterus galbula)

Cited by 7 publications

References 0 publications

Patterns of frugivory in the columnar cactusPilosocereusleucocephalus

Patterns of frugivory in the columnar cactusPilosocereusleucocephalus

Changes in Nesting Density of Baltimore Orioles (1976-1995) and Other Species in the Dune- Ridge Forest, Delta Marsh, MB: Response to an Outbreak of Forest Tent Caterpillar?

Using changes in land use and land cover to predict avian species occurrences at

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