The role of broadcast calls in facilitating detection of barred owls Strix varia, great horned owls Bubo virginianus, flammulated
owls Otus flammeolus, screech-owls Megascops spp., northern saw-whet owls and other species is well documented (Takats et al.
In Montana, surveys and incidental observations have also led to the 1st nest records and new distribution data for Barn Owl (Tyto alba) (Holt and others 1992), Flammulated
Owl (Psiloscops flammeolus) (Holt and others 1987), and Boreal Owl (Holt and Ermatinger 1989).
2002: No extra-pair fertilization in flammulated
owls despite aggregated nesting.
Survey of blood parasites in two forest owls, northern saw-whet owls and flammulated
owls, of western north America.
Owl (Otus flammeolus) was also reported from El Potosi by Contreras-Balderas (1992b).
The agency relied primarily on a 2006 study that monitored flammulated
Mark-recapture and DNA fingerprinting data reveal high breeding-site fidelity, low natal philopatry, and low levels of genetic population differentiation in flammulated
owls (Otus flammeolus).
Given the high overall ER, this finding suggests marked differences in species susceptibility to the virus, with species falling into one of three groups (for scientific names see Table 1): death rates >90% (Snowy Owl, Great Gray Owl, Northern Hawk Owl, Boreal Owl, and Northern Saw-whet Owl), death rates <20% (Long-eared Owl, Short-eared Owl, Great Horned Owl, Flammulated
Owl, and Northern Pygmy Owl), and death rates = 0% (Barn Owl, Burrowing Owl, and Eastern Screech Owl).
Some of the birds that can be found there typically do not occur elsewhere in the country and include the colima warbler, Lucifer hummingbird, band-tailed pigeon, varied bunting, flammulated
owl, elf owl, Mexican jay, black-chinned sparrow, green kingfisher, pyrrhuloxia, and crissal thrasher.
If, as seems likely there turn out to be fewer beetles in a cut-over area, agency scientists will be able to infer that beetle-dependent flammulated
owls need a forest with trees in it to survive.
Until 13 years ago, little if any research had been done on flammulated
owls; just over a century ago the species was unknown to science.