Barn Owls

On Friday (2023-07-07) my granddaughter and I saw two barn owls in a large pine tree. There were three nests - one was about 2-3 times the size of the others. A juvenile was next to the largest nest staring down at us. We briefly saw an adult flap its wings and then settle down into one of the smaller nests. Unfortunately, I didn't have my camera that day, so we went back on Wednesday (2023-07-12). We didn't see the owls, but evidence of their presence was there: bird droppings on the sidewalk, many feathers and we counted 9 owl pellets.

Publicado el julio 14, 2023 12:44 TARDE por truthseqr truthseqr

Observaciones

Fotos / Sonidos

Qué

Lechuza de Campanario (Tyto alba)

Observ.

truthseqr

Fecha

Julio 12, 2023 a las 03:50 TARDE PDT

Descripción

Barn Owl Pellet #A-01

Location: (Site-A) Found under the pine tree where this owl roosts:
https://www.inaturalist.org/observations/173672073

Pellet length: not measured
Pellet age: Unknown
Dissected? Yes

This pellet contained the remains of two species:

  1. (Botta’s Pocket Gopher) https://www.inaturalist.org/observations/172690847
  2. (North American Deer Mice) https://www.inaturalist.org/observations/172945757

Etiquetas

Fotos / Sonidos

Qué

Lechuza de Campanario (Tyto alba)

Observ.

truthseqr

Fecha

Julio 12, 2023 a las 03:58 TARDE PDT

Descripción

Barn Owl Pellet #A-02

Location: (Site-A) Found under the pine tree where this owl roosts:
https://www.inaturalist.org/observations/173672073

Pellet length: not measured
Pellet age: Unknown
Dissected? Yes

This pellet contained the remains of two species:

  1. (California Vole) https://www.inaturalist.org/observations/172692463
  2. (Western Harvest Mouse) https://www.inaturalist.org/observations/173788479

Etiquetas

Fotos / Sonidos

Qué

Lechuza de Campanario (Tyto alba)

Observ.

truthseqr

Fecha

Julio 12, 2023 a las 04:11 TARDE PDT

Descripción

Barn Owl Pellet #A-03

Location: (Site-A) Found under the pine tree where this owl roosts:
https://www.inaturalist.org/observations/173672073

Pellet length: not measured
Pellet age: Unknown
Dissected? Yes

This pellet contained the remains of two species:

  1. (Botta’s Pocket Gopher) https://www.inaturalist.org/observations/172691120
  2. (California Vole) https://www.inaturalist.org/observations/172833851

Etiquetas

Fotos / Sonidos

Qué

Lechuza de Campanario (Tyto alba)

Observ.

truthseqr

Fecha

Julio 12, 2023 a las 04:28 TARDE PDT

Descripción

Barn Owl Pellet #A-04

Location: (Site-A) Found under the pine tree where this owl roosts:
https://www.inaturalist.org/observations/173672073

Pellet length: not measured
Pellet age: Unknown
Dissected? Yes

This pellet contained the remains of two species:

  1. (North American Deer Mice x2) https://www.inaturalist.org/observations/172693506
  2. (Western Harvest Mouse x2) https://www.inaturalist.org/observations/172999960

Etiquetas

Fotos / Sonidos

Qué

Tuza Norteña (Thomomys bottae)

Observ.

truthseqr

Fecha

Julio 12, 2023 a las 03:50 TARDE PDT

Descripción

Bones found in barn owl pellet #A-01.

Here is the observation for the pellet itself:
https://www.inaturalist.org/observations/172677883

Etiquetas

Fotos / Sonidos

Qué

Tuza Norteña (Thomomys bottae)

Observ.

truthseqr

Fecha

Julio 12, 2023 a las 04:11 TARDE PDT

Descripción

Bones found in barn owl pellet #A-03.

Here's the observation for the pellet itself:
https://www.inaturalist.org/observations/172690619

References:
• Entire skeleton: https://www.reptileevolution.com/heterocephalus.htm
• Skull & maxilla, teeth & habits: https://www.utep.edu/leb/PleistNM/taxaMamm/Geomyidae.htm
• Long bones & scapula: https://freyjasforest.com/products/pocket-gopher-bone-lot
• iNaturalist Taxa Info: https://www.inaturalist.org/taxa/44062-Thomomys-bottae

Etiquetas

Fotos / Sonidos

Qué

Metorito de California (Microtus californicus)

Observ.

truthseqr

Fecha

Julio 12, 2023 a las 03:58 TARDE PDT

Descripción

Bones from barn owl pellet #A-02.

Here is the observation for the pellet itself:
https://www.inaturalist.org/observations/172677889

Etiquetas

Fotos / Sonidos

Qué

Ratones de Campo (Género Peromyscus)

Observ.

truthseqr

Fecha

Julio 12, 2023 a las 04:28 TARDE PDT

Descripción

Bones from barn owl pellet #A-04.

Here is the observation for the pellet itself:
https://www.inaturalist.org/observations/172690620

Etiquetas

Fotos / Sonidos

Qué

Metorito de California (Microtus californicus)

Observ.

truthseqr

Fecha

Julio 12, 2023 a las 04:11 TARDE PDT

Descripción

Bones found in barn owl pellet #A-03.

Here's the observation for the pellet itself:
https://www.inaturalist.org/observations/172690619

Etiquetas

Fotos / Sonidos

Qué

Ratón Cosechero Común (Reithrodontomys megalotis)

Observ.

truthseqr

Fecha

Julio 12, 2023 a las 04:11 TARDE PDT

Descripción

Bones from barn owl pellet #A-05.

This pellet was cut open before I got a photo of the pellet itself. Also, the images are blurry - we were getting tired, so we saved the rest of the pellets for another day.

Here's the observation for the pellet itself:
https://www.inaturalist.org/observations/182471277

Etiquetas

Fotos / Sonidos

Qué

Ratones de Campo (Género Peromyscus)

Observ.

truthseqr

Fecha

Julio 12, 2023 a las 03:50 TARDE PDT

Descripción

Bones found in barn owl pellet #A-01.

Here is the observation for the pellet itself:
https://www.inaturalist.org/observations/172677883

Etiquetas

Fotos / Sonidos

Qué

Ratón Cosechero Común (Reithrodontomys megalotis)

Observ.

truthseqr

Fecha

Julio 12, 2023 a las 04:28 TARDE PDT

Descripción

Bones from barn owl pellet #A-04.

Note the grooved upper incisors.

Here is the observation for the pellet itself:
https://www.inaturalist.org/observations/172690620

Note: in photo #6, only the smaller 2 skulls and mandibles are from harvest mice, the larger skull is from a Peromyscus.

Etiquetas

Fotos / Sonidos

Qué

Lechuza de Campanario (Tyto alba)

Observ.

truthseqr

Fecha

Julio 12, 2023 a las 04:28 TARDE PDT

Descripción

Barn Owl Pellet #A-06

Location: (Site-A) Found under the pine tree where this owl roosts:
https://www.inaturalist.org/observations/173672073

Pellet length: not measured
Pellet age: Unknown
Dissected? Yes

This pellet contained the remains of:
(California Vole) https://www.inaturalist.org/observations/173012330

Etiquetas

Fotos / Sonidos

Qué

Metorito de California (Microtus californicus)

Observ.

truthseqr

Fecha

Julio 12, 2023 a las 04:28 TARDE PDT

Descripción

Bones from barn owl pellet #A-06.

Here is the observation for the pellet itself:
https://www.inaturalist.org/observations/173011365

Etiquetas

Fotos / Sonidos

Qué

Lechuza de Campanario (Tyto alba)

Observ.

truthseqr

Fecha

Julio 12, 2023 a las 04:28 TARDE PDT

Descripción

Barn Owl Pellet #A-07

Location: (Site-A) Found under the pine tree where this owl roosts:
https://www.inaturalist.org/observations/173672073

Pellet length: not measured
Pellet age: Unknown
Dissected? Yes

This pellet contained the remains of:
(California Vole) https://www.inaturalist.org/observations/173016933

Etiquetas

Fotos / Sonidos

Qué

Metorito de California (Microtus californicus)

Observ.

truthseqr

Fecha

Julio 12, 2023 a las 04:28 TARDE PDT

Descripción

Bones from barn owl pellet #A-07.

Here is the observation for the pellet itself:
https://www.inaturalist.org/observations/173016050

Etiquetas

Fotos / Sonidos

Qué

Ratones de Campo (Género Peromyscus)

Observ.

truthseqr

Fecha

Julio 12, 2023 a las 04:11 TARDE PDT

Descripción

Bones from barn owl pellet #A-05.

This pellet was cut open before I got a photo of the pellet itself. Also, the images are blurry - we were getting tired, so we saved the last 3 pellets for another day.

Here's the observation for the pellet itself:
https://www.inaturalist.org/observations/182471277

Etiquetas

Comentarios

Publicado por truthseqr hace 11 meses

Totally cool!

Publicado por biohexx1 hace 11 meses

Cool! I've been doing something similar with a great horned owl at a nearby park: https://www.inaturalist.org/projects/tamanend-great-horned-owl-diet/journal.

Publicado por brennafarrell hace 11 meses

Wow, @brennafarrell !!! Your project is so awesome and interesting. I love how you compiled the data so it's easy to see what the owls eat over time. You've inspired me to continue monitoring these barn owls.

Publicado por truthseqr hace 11 meses

Thanks so much! Since I had so many observations at the park, I decided to make a project to easily find the observations. I can also export the data as a .csv, allowing me to easily make graphs and charts in Excel.
Good luck! Hopefully they'll give you lots of pellets to dissect.

Publicado por brennafarrell hace 11 meses

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