author={Tiberio C. Monterrubio-Rico and Javier Cruz-Nieto and Ernesto C. Enkerlin-Hoeflich and Diana VENEGAS-HOLGUIN and Lorena TELLEZ-GARCIA and Consuelo MARIN-TOGO},
Abstract We studied Thick-billed Parrot (Rhynchopsitta pachyrhyncha) nest-site density and social nesting behavior from 1998 to 2001 in Madera, Chihuahua, Mexico. The species formed high-density nesting clusters; 45 nesting attempts (30%) involved nesting pairs sharing nest trees, with a maximum of three nesting pairs per tree. The majority of nest trees were live or dead quaking aspens (Populus tremuloides). Clusters contained a mean of 11.5 breeding pairs (5 nests/ha). The highly social… 

Predation of nesting Thick-billed Parrots Rhychopsitta pachyrhyncha by bobcats in northwestern Mexico

Summary We report on what appear to be increasing predation events on nesting Thick-billed Parrots Rhychopsitta pachyrhyncha. Thick-billed Parrots are classified as ‘Endangered’ and their seasonal

What can the abundance of Grey Parrots on Príncipe Island tell us about large parrot conservation?

While populations of the Endangered Grey Parrot Psittacus erithacus have collapsed across its range, the species remains remarkably abundant on the island of Príncipe, Gulf of Guinea. We examine how

Complete mitochondrial genome of endangered Maroon-fronted Parrot (Rhynchopsitta terrisi) – conspecific relation of the species with Thick-billed Parrot (Rhynchopsitta pachyrhyncha)

Results indicated that in contrast to formal classification, both Rhynchopsitta taxa should be treated as subspecies of Maroon-fronted Parrot.

Factors Influencing Nest Spacing of a Secondary Cavity-Nesting Parrot: Habitat Heterogeneity and Proximity of Conspecifics

It is suggested that conspecifics influence the spatial distribution of reproductive pairs breeding simultaneously, with nesting pairs occupying areas where suitable cavities are more numerous, and the behavioral spacing requirements of nesting parrots may limit breeding densities and restrict management strategies to increase numbers of nesting pairs within protected areas.

Current and future habitat availability for Thick-billed and Maroon-fronted parrots in northern Mexican forests

Thick-billed Parrots (Rhynchopsitta pachyrhyncha) and Maroon-fronted Parrots (Rhynchopsitta terrisi) are the only parrots in Mexico found in high-elevation coniferous forests. Both species are

Insects found in birds’ nests from Argentina. Cyanoliseus patagonus (Vieillot, 1818) [Aves: Psittacidae], with the description of Cyanolicimex patagonicus, gen. n., sp. n., and a key to the genera of Haematosiphoninae (Hemiptera: Cimicidae)

The proposition of new characters for the identification of the four South American genera of Haematosiphoninae, together with the corresponding modifications to the key, are presented.

Sequential Use of Tree Cavities by Birds and Nest Web in a Riparian Forest in Southwest India

Abstract. We studied the sequential use of tree cavities by the cavity-nesting bird community in a riparian forest ecosystem of south-western India during 2013–2015. During the study period, a

Limited Geographic Variation in the Vocalizations of the Endangered Thick-Billed Parrot: Implications for Conservation Strategies

Vocal surveys at three geographically distinct breeding populations in the Sierra Madre Occidental of Chihuahua, Mexico suggest that differences in learned communication signals are unlikely to pose a barrier to the integration of translocated individuals from different populations into newly established populations.

Vocal dialects in parrots: patterns and processes of cultural evolution

Most studies support the idea that dialects are maintained by social benefits of matching local call types, a finding that has implications for the management of captive and endangered populations.

Nest-site characteristics and aspects of the breeding biology of the endangered Timneh Parrot Psittacus timneh in Guinea-Bissau

Investigation of the breeding ecology of Timneh Parrots in the Bijagós Archipelago focusing on two islands that harbour the densest populations suggests that the population may be limited by the availability of suitable nest cavities and that the installation of artificial nests could help increase the breeding population.



Nesting Ecology of Thick-Billed Parrots

-During a four-month search for nesting Thick-billed Parrots (Rhynchopsitta pachyrhyncha) in 1979, we found 55 active nests at elevations of 2,300 to 3,070 m in northwestern Mexico's Sierra Madre

Present use and characteristics of Thick-billed Parrot nest sites in northwestern Mexico

Decline of the Thick-billed Parrot seems to be related to large-scale logging over a wider historical breeding range by leaving few snags and pine trees large enough for parrots to nest in by commercial timber harvesting.

Nesting behavior of the lilac-crowned parrot

Nesting behavior of the Lilac-crowned Parrot was observed over a three year period at 24 nests in the tropical dry forest of the Chamela-Cuixmala Biosphere Reserve, western Mexico, and showed low nest site reuse and high synchrony of nest initiation.

Nest-site characteristics of the Socorro green parakeet

The Socorro Green Parakeet (Aratinga holochlora brevipes) has been previously considered a threatened species (CIPAMEX 1988, Collar and Juniper 1992, Collar et al. 1992). Rodriguez-Estrella et al.

Snag availability and communities of cavity nesting birds in tropical versus temperate forests

An analysis of avifaunal lists from these sites indicated that low latitude forests supported 2.5 times as many cavity nesting species and approximately equal numbers of primary cavity excavating species as high latitude forests.


The hypothesis that colonial breeding systems are unlikely to evolve in lineages of cavity-adopters is tested, and a phylogeny-based comparative analysis of nesting behavior in the Anseriformes indicates that in this group, colonial breeding has evolved less frequently than would be expected by chance.

A Guide to the Birds of Mexico and Northern Central America

Geography and bird distribution Climate and habitat Migration History of ornithology in Mexico Conservation Birding in Mexico and northern Central America Using this book Taxonomy Molt and plumage

Status and conservation of old-growth forests and endemic birds in the pine-oak zone of the Sierra Madre occidental Mexico

The pine-oak forests of the Sierra Madre Occidental, a mountain range in NW Mexico, have recently been recognized as an area of high endemism and biodiversity. Selective logging threatens three bird


Summary Evidence is presented to support the hypothesis that communal roosts, breeding colonies and certain other bird assemblages have been evolved primarily for the efficient exploitation of

Logging, Conifers, and the Conservation of Crossbills

A survey of the forestry literature shows that as the age and area of coniferous forests decline, decreased conifer seed production and increased frequencies of cone failures can be expected. This