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We describe a new disjunct population of Blue-footed Booby Sula nebouxii at Islote González in the Islas Desventuradas archipelago. Though likely much larger, the population size at the time of our survey was a minimum of 16 breeding pairs. On 14-15 December 2020, two pairs of boobies with nestlings and four pairs with empty nests were found. Likely the species is a recent arrival to the archipelago, perhaps during one of the strong El Niño events between 1970 and 2001 (especially 1982/83, when the species was first recorded in Chile). Blue-footed Booby might also nest on different areas at San Félix Island and some smaller islets around the archipelago, where they would have no nesting-site competition from the larger Masked Booby S. dactylatra. [ABSTRACT FROM AUTHOR]

We used blood samples of the Blue-footed Booby, considering sex (female and male) and age-class (adult and chick) of individuals at different breeding stages during two breeding seasons (2010–2011 and 2011–2012) in Isla El Rancho, Sinaloa, to determine lead, cadmium, and mercury concentrations. Lead and cadmium concentrations were below our detection limit (0.05 and 0.36 ppm, respectively). A higher concentration of mercury was found in early stages of breeding, likely related to changes in mercury environmental availability. Mercury concentrations in adults did not relate with their breeding output. Males and adults had higher mercury concentration than females and chicks. We provide information of temporal, sex and age-related variations in the concentrations of mercury in blood of the Blue-footed Booby. [ABSTRACT FROM AUTHOR]

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The article discusses the molecular characterization of hybridization between brown Sula leucogaster and blue-footed Boobies S. nebouxii. The researchers collected blood, feather or tissue samples from 30 brown and 15 blue-footed boobies from the Eastern Tropical Pacific. The findings of molecular sexing demonstrated that both putative hybrids were male.

The article discusses a study which investigated the hybridization between Blue-footed (Sula nebouxii) and Peruvian (Sula variegata) Boobies on Lobos de Tierra Island and Lobos de Afuera islands in Northern Peru. The researchers took morphological measurements, feather and blood samples over three field seasons. It was found that there was a rare incident of hybridization between the three species.

The article discusses a study on inshore feeding behavior of blue-footed boobies, or Sula nebouxii, in Ecuador during warming conditions in equatorial pacific ocean, citing that the boobies were feeding in a dense and coordinated group, and prey were highly local along the South American coast.

The article offers information related to a study which found that increased population of Gal#25;pagos islands has decreased the population of the populations of blue-footed boobies (Sula nebouxii exdsa) from the region as of April 2014.