134.
Singer F. J., L. C. Zeigenfuss y L.
 Spicer. 2001. "Role of patch
 size, disease, and movement in
 rapid extinction of bighorn
 sheep" en Conservation Biology
 15: 1347-1354.


Wiggins, D. A., A. P. Moller, M. F.
 L.Sorensen y A. L. Brand. 1998.
 "Island biogeography and the
 reproductive ecology of great tits
 Parus major" en Oecologia 115
 (4): 478-482.


r;l.

 'a-'


Toledo (Chiroxiphia linearis) capturado con redes de neblina, en Esparza,
Costa Rica