Publications

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implementation of a sampling strategy to detect west nile virus in oral and cloacal samples in live song birds.in 1999, west nile virus (wnv) first appeared in the united states and has subsequently infected more than a million people and untold numbers of wildlife. though primarily an avian virus, wnv can also infect humans and horses. the current status of wnv and its effects on wildlife in pennsylvania (pa) is sparsely monitored through sporadic testing of dead birds. in order to acquire a more comprehensive understanding of the status of wnv in wild birds, a study was designed and implemented to samp ...201525863262
cross-scale effects of spruce budworm outbreaks on boreal warblers in eastern canada.insect outbreaks are major natural disturbance events that affect communities of forest birds, either directly by affecting the food supply or indirectly by changing the vegetation composition of forest canopies. an examination of correlations between measures of bird and insect abundance across different spatial scales and over varying time lag effects may provide insight into underlying mechanisms. we developed a hierarchical bayesian model to assess correlations between counts of eight warble ...201830151153
organophosphate pesticide method development and presence of chlorpyrifos in the feet of nearctic-neotropical migratory songbirds from canada that over-winter in central america agricultural areas.recent modeling analysis suggests that numerous birds may be at risk of acute poisoning in insecticide-treated fields. although the majority of avian field studies on pesticides have focused on treated seed, granule, insect or vegetation (oral exposure) ingestion, dermal exposure is an important exposure route when birds come into contact with deposited pesticides on foliage and other surfaces. some nearctic-neotropical migratory songbirds are likely exposed to pesticides on their non-breeding h ...201626421621
fruit production, migrant bird visitation, and seed dispersal of guarea glabra in panama.the relationship between bird visitation and the size of the available fruit crop was studied at an understory tree (guarea glabra vahl, meliaceae) in the tropical wet forest of barro colorado island, panama canal zone. twelve resident species and seven north american migrant species fed on the bright orange arilloids (seeds with arils), which were not depleted during the normal fruiting period. the number of individual visitors, the number of visiting species, and the number of seeds removed in ...197928309435
fruit production, migrant bird visitation, and seed dispersal of guarea glabra in panama.the relationship between bird visitation and the size of the available fruit crop was studied at an understory tree (guarea glabra vahl, meliaceae) in the tropical wet forest of barro colorado island, panama canal zone. twelve resident species and seven north american migrant species fed on the bright orange arilloids (seeds with arils), which were not depleted during the normal fruiting period. the number of individual visitors, the number of visiting species, and the number of seeds removed in ...197928309435
extensive distribution of the lyme disease bacterium, borrelia burgdorferi sensu lato, in multiple tick species parasitizing avian and mammalian hosts across canada.lyme disease, caused by the spirochetal bacterium, borrelia burgdorferi sensu lato (bbsl), is typically transmitted by hard-bodied ticks (acari: ixodidae). whenever this tick-borne zoonosis is mentioned in medical clinics and emergency rooms, it sparks a firestorm of controversy. denial often sets in, and healthcare practitioners dismiss the fact that this pathogenic spirochetosis is present in their area. for distribution of bbsl across canada, we conducted a 4-year, tick⁻host study (2013⁻2016) ...201830424543
extensive distribution of the lyme disease bacterium, borrelia burgdorferi sensu lato, in multiple tick species parasitizing avian and mammalian hosts across canada.lyme disease, caused by the spirochetal bacterium, borrelia burgdorferi sensu lato (bbsl), is typically transmitted by hard-bodied ticks (acari: ixodidae). whenever this tick-borne zoonosis is mentioned in medical clinics and emergency rooms, it sparks a firestorm of controversy. denial often sets in, and healthcare practitioners dismiss the fact that this pathogenic spirochetosis is present in their area. for distribution of bbsl across canada, we conducted a 4-year, tick⁻host study (2013⁻2016) ...201830424543
two species of synhimantus (dispharynx) railliet, henry and sisoff, 1912 (nematoda: acuarioidea: acuariidae), in passerine birds from the area de conservacion guanacaste, costa rica.members of 2 species of synhimantus (dispharynx) live under the lining of the gizzard in passerine birds from the area de conservacion guanacaste, costa rica. synhimantus (dispharynx) nasuta (rudolphi, 1819) occurs in thraupis episcopus, turdus grayi, caryothraustes poliogaster, platyrinchus cancrominus, ramphocaenus melanurus, vermivora peregrina, and geothlypis poliocephala. a single male, in turdus grayi, apparently representing a new species, distinguishable from all other species of synhima ...200415562615
two species of synhimantus (dispharynx) railliet, henry and sisoff, 1912 (nematoda: acuarioidea: acuariidae), in passerine birds from the area de conservacion guanacaste, costa rica.members of 2 species of synhimantus (dispharynx) live under the lining of the gizzard in passerine birds from the area de conservacion guanacaste, costa rica. synhimantus (dispharynx) nasuta (rudolphi, 1819) occurs in thraupis episcopus, turdus grayi, caryothraustes poliogaster, platyrinchus cancrominus, ramphocaenus melanurus, vermivora peregrina, and geothlypis poliocephala. a single male, in turdus grayi, apparently representing a new species, distinguishable from all other species of synhima ...200415562615
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