Zimmerius villarejoi

Taxonomy

Assessment Information

Geographic Range

Population

Habitat and Ecology

Threats

Conservation Actions

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Taxonomy [top]

Kingdom	Phylum	Class	Order	Family
ANIMALIA	CHORDATA	AVES	PASSERIFORMES	TYRANNIDAE

Scientific Name:

Zimmerius villarejoi

Species Authority:

Alvarez Alonso & Whitney, 2001

Common Name/s:

English

–

Mishana Tyrannulet

Assessment Information [top]

Red List Category & Criteria:

Vulnerable C2a(ii) ver 3.1

Year Published:

2012

Assessor/s:

BirdLife International

Reviewer/s:

Butchart, S. & Symes, A.

Contributor/s:

Justification:
This recently described species has a very small population, which is likely to be declining owing to habitat loss and degradation resulting from continuing timber extraction. The species consequently qualifies as Vulnerable.

History:

2008	–	Vulnerable
2004	–	Vulnerable
2002	–	Vulnerable
2000	–	Not Recognized
1994	–	Not Recognized
1988	–	Not Recognized

Geographic Range [top]

Range Description:	Zimmerius villarejoi is known only from an extremely limited habitat type in the río Nanay drainage near Iquitos, Loreto, the lower río Mayo and middle río Huallaga, San Martín (J. Díaz in litt. 2012), and a 1912 specimen taken from Moyobamba, San Martín, Peru.
Countries:	Native: Peru
Range Map:	Click here to open the map viewer and explore range.

Population [top]

Population:	The population is estimated to number 2,500-9,999 mature individuals based on an assessment of known records, descriptions of abundance and range size. This is consistent with recorded population density estimates for congeners or close relatives with a similar body size, and the fact that only a proportion of the estimated Extent of Occurrence is likely to be occupied. This estimate is equivalent to 3,750-14,999 individuals, rounded here to 3,500-15,000 individuals.
Population Trend:	Decreasing

Population:

The population is estimated to number 2,500-9,999 mature individuals based on an assessment of known records, descriptions of abundance and range size. This is consistent with recorded population density estimates for congeners or close relatives with a similar body size, and the fact that only a proportion of the estimated Extent of Occurrence is likely to be occupied. This estimate is equivalent to 3,750-14,999 individuals, rounded here to 3,500-15,000 individuals.

Population Trend:

Decreasing

Habitat and Ecology [top]

Habitat and Ecology:	It is confined to 'varillal' habitat - poorly drained, 12-18 m tall forest on white sand soils. The species's distribution seems to coincide with that of two or three tree species. It is uncommon and very patchily distributed. The diet includes small arthropods and fruit, notably the berries of the mistletoe Oryctanthus alveolatus.
Systems:	Terrestrial

Threats [top]

Major Threat(s):	Most of the known range is within a protected area. However, the limited extent of appropriate varillal habitat, and the continuing extraction of trees for building materials and posts, means that much of the population is threatened or at least compromised. Outside the protected area, the few varillales in which the species is known to occur (on the upper Rio Nanay) are completely unprotected, and are currently being heavily exploited for timber and other products.

Major Threat(s):

Most of the known range is within a protected area. However, the limited extent of appropriate varillal habitat, and the continuing extraction of trees for building materials and posts, means that much of the population is threatened or at least compromised. Outside the protected area, the few varillales in which the species is known to occur (on the upper Rio Nanay) are completely unprotected, and are currently being heavily exploited for timber and other products.

Conservation Actions [top]

Conservation Actions:	Conservation Actions Underway It occurs within the recently created Allpahuayo-Mishana National Reserve (c.580 km²). Conservation Actions Proposed Search for this species (or close relatives) in sandy soil forests in the Tarapoto-Moyobamba region of Peru, and perhaps in eastern Ecuador and Colombia. Determine the extent of occupied or suitable habitat, and estimate the population size. Determine the extent to which current threats are impacting the species. Grant protection to additional occupied sites and areas of suitable habitat. Improve the protection of varillal habitat in the Allpahuayo-Mishana National Reserve.

Conservation Actions:

Conservation Actions Underway
It occurs within the recently created Allpahuayo-Mishana National Reserve (c.580 km²).

Conservation Actions Proposed
Search for this species (or close relatives) in sandy soil forests in the Tarapoto-Moyobamba region of Peru, and perhaps in eastern Ecuador and Colombia. Determine the extent of occupied or suitable habitat, and estimate the population size. Determine the extent to which current threats are impacting the species. Grant protection to additional occupied sites and areas of suitable habitat. Improve the protection of varillal habitat in the Allpahuayo-Mishana National Reserve.

Citation:	BirdLife International 2012. Zimmerius villarejoi. In: IUCN 2012. IUCN Red List of Threatened Species. Version 2012.2. <www.iucnredlist.org>. Downloaded on 25 May 2013.
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