Contribuidor
Fecha
Localidad
- Edad y sexo
- Adulto, sexo desconocido - X
- Sonidos
- Llamado
- Playback
- Se usó playback
Comentarios
Short note following first call is from playback in background. Long series of short calls was given some 10 minutes after last playback when the bird flew in close after not having been seen for several minutes.
Detalles de la observación
***Mega. Continuing 'western' flycatcher near the Boathouse. Relocated today this morning by Anthony Collerton, seen periodically through the morning. Foraging constantly. Almost constant movement would be punctuated by fairly long periods of inactivity on a perch. Generally stayed very low, often only a foot or two off the ground. Empidonax flycatcher, very yellow overall with bold white eyering. Very ratty plumage, especially on the head, often looking tufted. Occasionally making very short high-pitched metallic notes. Gave two position calls after brief playback to stimulate more diagnostic calls: single-noted, upswept Pacific-slope -type calls. Spectrogram from ML29916831. Nick Mason and Nathan Goldberg worked through the spring semester of 2016 on the fecal extraction of this bird and found that when comparing the ND2 (mitochondrial) gene between Cordilleran and Pacific-slope Flycatchers, there are 5-6 Single Nucleotide Polymorphisms (SNPs) that have been used to tell the two species apart (as seen in Rush et al. 2009). These SNPs should be present if the bird is a Cordilleran Flycatcher, and not present if it is a Pacific-slope. We only really need 3+ SNPs to tell this, which is why we eventually focused our efforts on examining the first section (of 4) of the gene (as it contains 3 SNPs). In the image attached here, you can see these SNPs are NOT present, indicating the bird is either a Pacific-slope or Pacific-slope X Cordilleran Flycatcher hybrid:
Información técnica
- Grabadora
- Marantz PMD 661 MkII
- Micrófono
- Telinga Pro 6
- Accesorios
- Telinga 22" Parabola
- Original file size
- 16.56 MB