Rodríguez Rivera, Kenneth X.

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    Comparison of two survey methods and abundance of the Puerto Rican Lizard Cuckoo, 𝘊𝘰𝘤𝘤𝘺𝘻𝘶𝘴 𝘷𝘪𝘦𝘪𝘭𝘭𝘰𝘵𝘪 Bonaparte 1850 (Aves: Cuculiformes: Cuculidae) in a northern karst forest
    (2023-12-08) Rodríguez Rivera, Kenneth X.; Puente Rolón, Alberto R.; College of Arts and Sciences - Sciences; Collazo, Jaime; Bird Picó, Fernando J.; Department of Biology; Ortíz Bermúdez, Patricia
    Birds that have cryptic behaviors may be underestimated when surveyed. Scientists can use tools to help them achieve a more accurate population estimate and avoid “negative bias.” We tested and compared the effectiveness of two survey methods: the traditional point count and the playback broadcast method, when surveying the Puerto Rican lizard cuckoo Coccyzus vieilloti in Cambalache state forest (Northern karst belt, Puerto Rico) in the breeding and non-breeding season. With these surveys we also obtained population estimates and detection probabilities. Twenty stations were surveyed during the first 3 hours after sunrise with both survey methods (on separate occasions) twice every season. There was no significant difference on detection probabilities during breeding and non-breeding season when using the playback method, but higher population estimates were obtained during the breeding season. As expected, surveys during the breeding season yielded higher recapture probability estimates while during the non-breeding season, there was a higher capture detection probability when using the Playback broadcast. Population estimates yielded by the playback broadcast survey were significantly higher during the breeding season. This study proves that surveying the lizard cuckoo during the breeding season while using the playback broadcast survey type provides more accurate population estimates and that this method is more effective in yielding detection estimates of the species when used in the same season.