Guilherme Willrich

Londrina State University | UEL · Departamento de Biologia Animal e Vegetal

The knowledge on the diet of neotropical birds species is incipient, and even common and widespread species still lack this basic information. In the present study we reviewed the diet of the gray-hooded attila (Attila rufus), a species endemic to the Atlantic Forest biome. For this, three approaches were used: literature review, citizen science da...

Knowledge on the reproductive biology of neotropical bird species is still scarce. Many species lack basic information regarding descriptions of nests and eggs, incubation and nestling periods, and parental care. In the present study we explore several aspects of the reproductive biology of Hemitriccus kaempferi, an endemic and threatened species o...

Knowledge on the reproductive biology of neotropical bird species is still scarce. Many species lack basic information regarding descriptions of nest and eggs, incubation and nestling period, and parental care. In the present study we explore several aspects of the reproductive biology of Hemitriccus kaempferi based on banded individuals that were...

The theory behind metacommunity was recently reframed to incorporate the concepts of community ecology. Here we investigate how slight topographic variations might locally create habitat heterogeneity and a system of interchanging bird species (i.e., a metacommunity) in a continuous tropical forest. We studied the distribution of birds in a large a...

Geophagy is a behavior reported for several animal species, including at least 260 bird species. Sources of soil for geophagy are diverse and include clay licks, exposed soil, riverbanks, and termite nests. The aim of the present study is to report cases of geophagy in what seems to be an unusual source of soil for bird geophagy, the mud nest of th...

The Black-capped Becard (Pachyramphus marginatus) has two geographically isolated subspecies, including the Atlantic Forest subspecies that is distributed from Pernambuco State to Paraná State. Here we report the first observation of the species in Santa Catarina State, southern Brazil. On 12 November 2019 an adult male of P. marginatus was observe...

The present study reports for the first time the predation of a tropical house gecko (Hemidactylus mabouia) by white-throated woodcreeper (Xiphocolaptes albicollis), a species of neotropical forest bird. Since reports on predation are few and scattered, we also present a brief review of the predatory birds of H. mabouia.

Restoration practices are designed to reverse the negative effects of human activities on the environment, allowing the recovery of biodiversity and ecosystem functions. However, restoration activities require monitoring the recolonization of faunal assemblages to assess whether ecosystem functions and services performed by them have been recovered...

Geophagy is the intentional ingestion of soil or sediments by different animal species. In birds this behaviour has been widely reported in Psittacidae and Columbidae, but less so for other families, such as Corvidae. The goal of the present study was to review cases of soil ingestion by corvids and also report a new observation of geophagy in Azur...

The Broad-winged Hawk ( Buteo platypterus (Vieillot, 1823)) (Accipitriformes: Accipitridae) is a migratory bird of prey that winters in Central and South America. This note reports two new records of the species in southern Brazil, which are currently the southernmost records in wintering areas. One of the observations represents the first occurren...

If a forest fragment maintains original heterogeneous habitat conditions after deforestation and fragmentation of the landscape, is it possible that distinct communities can still remain within the forest remnant as they once occurred in the continuous forest landscape? In the present study, we assessed whether a single forest fragment could harbou...

Scientists have long been trying to understand why the Neotropical region holds the highest diversity of birds on Earth. Recently, there has been increased interest in morphological variation between and within species, and in how climate, topography, and anthropogenic pressures may explain and affect phenotypic variation. Because morphological dat...

Scientists have long been trying to understand why the Neotropical region holds the highest diversity of birds on Earth. Recently, there has been increased interest in morpho- logical variation between and within species, and in how climate, topography, and anthropogenic pressures may explain and affect phenotypic variation. Because morphological d...

The delineation of unique areas in biodiversity is crucial for conservation planning. However, identification of distinct biotas is a challenging task. In this study, we use an objective analytical process to test if bird and plant species composition of three different forest formation in the Atlantic forest Biome is sufficiently distinct to merit...

Human activities have modified landscapes worldwide, promoting fragmentation and isolation of forest habitats. Such landscape modifications are responsible for changes in species composition due to extinction and colonization events. Forest species dynamism is usually affected by forest fragmentation when remaining fragments are small and isolated,...

New and documented records of birds to the Santa Catarina Island, Brazil