86. Bildstein, K. L., and M. Saborio. 2000. Spring migration counts of raptors and New World vultures in Costa Rica. Ornitologia Neotropical 11:197-205. | Hawk Mountain Sanctuary: Learn Visit Join

86. Bildstein, K. L., and M. Saborio. 2000. Spring migration counts of raptors and New World vultures in Costa Rica. Ornitologia Neotropical 11:197-205.

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