Seven environmental factors were

recorded for each site and nests. Nests were monitored for 2 months after installation, by which time, 46% of the nests had been excavated. Depredation rate was affected by both the presence of eggs (P < 0.001) and being sprayed with turtle pond water (P = 0.005); but we found that even 38% of empty nests (holes simply dug and ICG-001 concentration refilled) were excavated. Nest excavation was more likely for more obvious nests located in areas with more sparse vegetation (P < 0.05) closer to the shoreline (P < 0.01). Excavation rates were highest immediately after installation, but continued for the duration of the monitoring period. The introduced red fox Vulpes vulpes was identified as the only predator observed on cameras for a subset of 60 nest-sets. In conclusion, foxes use both visual and olfactory cues to locate nests, and environmental C59 wnt conditions at the nest site significantly influence the fate of the nests. “
“Although mixed-species associations of birds or primates have been well studied, primate–bird associations have received comparatively little attention. Additionally, benefits accruing with such associations have rarely been quantified. Over 13 months, 17 insectivorous bird species were observed associating with golden-backed uacaris. Detailed study of four found that feeding sally frequency significantly

increased for sit-and-wait foragers (bronzy jacamar, Galbula leucogastra; black-fronted nunbird, Monasa nigrifrons), when uacaris were present within 14.9 m, but not when

within 15–30 m. Contemporaneously, no significant differences were observed in peck bout frequency for two uacari-following bark- and leaf-gleaning antbirds (black-crested antshrike, Sakesphorus canadensis, black-winged antbird, Hypocnemoides melanopogon) when uacaris were present or absent. Antbird/uacari approximation is attributed to significant reductions in the presence of small bird-eating raptors when uacaris are present. Reasons for this are uncertain but may be because large raptors (e.g. harpy eagles) follow uacaris. So, while some bird species may gain foraging benefits from uacari presence, others may follow them because their proximity reduces predation risk. This appears foraging guild dependent. Except for work linking increased jacana MCE公司 peck rates with swamp-visiting gorilla presence, this study is the first to quantify benefits to birds of following primates, and the first such Neotropical study. “
“Maintaining a meta-population structure significantly contributes to species viability and is often the basis for defining the difference between a naturally patchy and a fragmented landscape. However, a heterogeneous landscape may be patchy for habitat generalists and fragmented for specialists, preventing the formation of meta-population structures in habitat specialists.