COTINGA 5 Great Green in

The ambigua guayaquilensis in Ecuador: first nest with young

Karl S. Berg and Eric Horstman

Introduction and rise to serious concern among conservationists, Throughout its disjunct range in the Neotropics, with both occurring in areas subject to extensive the Great Green Macaw Ara ambigua is one of . the most threatened of all psittacids. The spe­ cies is confined to the lowland and foothill First recorded nesting tropical forests located to the west and north of In view of the concern over the status of this the Andean chain (i.e. “trans-Andean”), and is macaw, it is pleasing to report the nesting near nowhere common. The poses an interest­ Guayaquil, Guayas Province, Ecuador of a pair ing taxonomic problem in that the individuals of A. a. guayaquilensis. It is doubly pleasing to ascribed to the southern taxon, A. a. report that every effort is being made by the guayaquilensis are variable, and in many respects Ecuadorean organisation, Fundación Pro- approach the Ara militaris. In­ Bosque, to conserve the nesting site, and to make deed, it has been suggested that not only is visiting birders welcome. The breeding, which guayaquilensis synonymous with ambigua, but is the first recorded for the southern taxon, oc­ th a t A. am bigua may be conspecific with A. curred in the 2000-ha dry tropical forest of militaris2. It is possible that there is genetic in­ Bosque Protector Cerro Blanco, located in the stability between the various populations of the Chongón-Colonche hills of Guayas Province. On different taxa of the two species, in part brought 14 August 1994 two adult were reported about by the low population levels, which could occupying a cavity in a dead but standing “pigío” result in further gene flow between different Cavanillesia platanifolia tree. Soon thereafter, a groups of . There is no doubt, however, that hide was constructed c. 25 m from the base of the the two taxa comprising A. ambigua are giving tree and daily observations were coordinated by

53 COTINGA 5 Great Green Macaw in Ecuador the reserve management. The nest was kept sightings of 2–4 individuals were noted in the under 24-hour surveillance to prevent the chicks vicinity of the 1994 nest-tree. Although the ma­ being stolen for the pet trade. On 6 September caws were not reported to have used the artificial two nestlings were seen inside the cavity; these nest, the cavity was scrutinised on several occa­ were seen again on 7 and 29 September. The nest sions by the birds. was vacated by 1 October. Detailed notes were taken throughout this period on the birds’ be­ Conservation haviour at the nest-site, and vocalisations of the Forest clearance, often associated with fires set adults were recorded. by settlers staking a claim on the land, has in­ creased dramatically outside the Cerro Blanco The 1995 nesting season reserve. This, coupled with the continuing ex­ Beginning in April 1995, a pair of macaws (pos­ pansion of the city of Guayaquil towards Cerro sibly the same nesting pair) were observed Blanco, means that the reserve is destined to returning to the nest-site where the two chicks become an island of habitat surrounded by ur­ successfully fledged the previous season. The ban development and agricultural lands. To pair were seen entering the nest-cavity on sev­ ensure the long-term survival of the wide-rang­ eral occasions and all signs pointed to another ing A. ambigua in this area, it is clearly essential nesting attempt when, in late July, the top part to identify and protect areas used by the birds of the “pigio” tree, which was badly infested with for feeding and nesting outside of the existing termites, broke off leaving the nest-cavity ex­ reserve. posed. Significant progress was made to this end In an effort to make up for the loss of the 1994 when, in October 1995, due to the generosity of nest-site and encourage new nesting activity in La Cemento Nacional, c. 280 ha of land were 1995, the Cerro Blanco reserve management con­ purchased and incorporated into the reserve structed artificial nest-sites at two locations, one boundaries, which now embrace 2280 ha. The near the fallen tree, and another close to a top­ new area includes a cross-section of habitats pled (again termites!) “pigio” tree where the from wetter forest to a drier area dominated by macaws had been observed previously. The arti­ Cavanillesia platanifolia, and in which the ma­ ficial nests were made of PVC piping and wooden caws have frequently been recorded (e.g. two boxes, based on a similar design successfully pairs seen at the end of December 1995). Other employed with other species of macaw in . areas adjacent to Cerro Blanco have been iden­ Between 18 August and 23 November, 13 tified for purchase and inclusion within the reserve although the necessary funds urgently need to be raised. Reforestation programmes and environmental education campaigns are also Site information and access for birders planned for 1996 in an attempt to safeguard the The Bosque Protector Cerro Blanco is normally fauna and flora of this critical area, but these open from 08h00 to 16h00 for the visiting pub­ similarly need additional funds. lic, but other arrangements can be made in advance, especially for birders wishing to visit References the site early in the morning. An entrance charge 1. Berg, K. S. (1994) New and interesting of $5 is levied, and this includes the use of an records of birds from a dry forest reserve in excellent camping area. The reserve manage­ ment is inaugurating a new trail to access more south-west Ecuador. Cotinga 2: 14–19. remote parts of the reserve. Cerro Blanco holds 2. Fjeldså, J., Krabbe, N. & Ridgely, R. S. (1987) a number of birds characteristic of the Great Green Macaw Ara ambigua collected Tumbesian Endemic Area and many threat­ in northwest Ecuador, with taxonomic com­ ened species, and should feature on any birder’s ments on Ara militaris. Bull. Brit. Orn. Club itinerary for this part of Ecuador. Reservations 107: 28–32. or enquiries can be made through: the Fundación Pro-Bosque office at Multicomercio Bldg., Calle Karl S. Berg Cuenca y Eloy Alfaro, 2nd floor locale 91, Guayaquil Casilla 7343, Guayaquil, Ecuador (Tel: +4/416975 and +4/417004); or the organi­ sation’s Administrative Centre at Kilómetro 15 Eric Horstman via a la Costa, Guayaquil (Tel: +4/872236 and +4/ Bosque Protector Cerro Blanco, Apartado Postal 09- 871900; Fax: +4/873528). 01-04243, Guayaquil, Ecuador

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