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1 June 2012 Communal Nesting Behavior in Mearns's Squirrels (Tamiasciurus mearnsi)
Nicolás Ramos-Lara, John L Koprowski
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Abstract

Communal nesting has been observed frequently in arboreal squirrels of the genus Sciurus and Glaucomys, but only occasionally in Tamiasciurus. During 2006 and 2007, we trapped and radiocollared 38 adult Mearns's squirrels (Tamiasciurus mearnsi) in Baja California, Mexico, to examine their nesting behavior. We report for the first time instances of communal nesting in Mearns's squirrels. Same-sex groups were more common than mixed-sex groups. Females engaged more in communal nesting than males. Communal nesting behavior in Mearns's squirrels seems to be similar to other species of arboreal squirrels; decreasing as mean monthly temperature increases and during the breeding season.

La anidación comunal ha sido observada frecuentemente en ardillas arborícolas del género Sciurus y Glaucomys, pero sólo ocasionalmente en Tamiasciurus. Durante 2006 y 2007, atrapamos y pusimos radio collares a 38 ardillas adultas de San Pedro Mártir (Tamiasciurus mearnsi) en Baja California, México, para examinar su comportamiento de anidación. Reportamos por primera vez casos de anidación comunal en las ardillas de San Pedro Mártir. Grupos del mismo sexo fueron más comunes que grupos de sexo mixto. Las hembras participaron más en anidación comunal que los machos. El comportamiento de anidación comunal en las ardillas de San Pedro Mártir parece ser similar a otras especies de ardillas arborícolas; disminuyendo conforme la temperatura media mensual aumenta y durante la temporada reproductiva.

Nicolás Ramos-Lara and John L Koprowski "Communal Nesting Behavior in Mearns's Squirrels (Tamiasciurus mearnsi)," The Southwestern Naturalist 57(2), 195-225, (1 June 2012). https://doi.org/10.1894/0038-4909-57.2.195
Received: 11 August 2010; Accepted: 1 November 2011; Published: 1 June 2012
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