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Frances's Sparrowhawk Accipiter francesiae Scientific name definitions

Alan C. Kemp, David Christie, and Guy M. Kirwan
Version: 1.0 — Published March 4, 2020
Text last updated November 7, 2017

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Field Identification

28–35 cm; male 104–140 g, female 112–185 g (1); wingspan 40–54 cm (2). On Madagascar, separation from region’s other small AccipiterA. madagascariens, is complicated, especially in immature and female plumages, and best distinguished by undertail-coverts pattern (barred in present species, unbarred in madagascariensis), throat pattern (narrowly streaked in madagascariensis, single central streak in present species), upperparts coloration (usually darkest in madagascariensis), underparts pattern and coloration (whitest in madagascariensis with well-defined dark barring, typically off-white in francesiae with relatively broad brown barring) and toe length (short in present species, but central toe long and spindly looking in madagascariensis, indicative of it being a bird specialist) (1). Extent of rufous barring on underparts of male varies individually. Female is larger (wing 173–188 mm, versus 154–165 mm) (1) and browner than male , with broader and much more profuse barring below. Bare parts: bill black with bluish-grey base, cere dull greenish yellow, irides yellow with orange-yellow orbital ring and legs dull yellow (1). Juvenile resembles adult female, but usually paler, with more cinnamon-brown barring, more prominent central throat-stripe and pale areas of underwing tinged cinnamon (1). In juveniles on Mayotte (race brutus) irides are initially greyish blue, becoming yellow at 2–7 months old, and acquires second (immature) plumage with darker (more greyish) upperparts and underparts intermediate between adult and juvenile, more scalloped than former but less spotted than latter; unknown whether such plumage exists in other races (1). Races differ markedly in size, colour intensity and extent of barring on underparts: griveaudi is smaller than nominate (wing of male 169–170 mm, mass 100–118 g) (1), but slightly larger than pusillus, and barred below on salmon-pink background, with grey bill, greenish-yellow cere, bright yellow eyes and yellow legs (1), sexes similar; pusillus is on average a little smaller than previous (wing of male 139–146 mm) (1), both sexes almost unmarked whitish grey below, with only minimal barring on breast-sides (especially in female), white underwing except dark tips to flight feathers (1); brutus also is small (wing of male 142–143 mm, mass 93–121 g) (1), both sexes closer in appearance to nominate female, warm brown above (especially in female), white below, with obvious rufous bars on breast , especially well marked in female (2). Identification easy on Comoros, where it is only member of genus (1). Within Madagascar, males in E can have darker upperparts and more strongly barred rufous underparts than those in W, but no additional subspecies recognized (1).

Systematics History

Editor's Note: This article requires further editing work to merge existing content into the appropriate Subspecies sections. Please bear with us while this update takes place.

Closely related to A. soloensis (which see). The three forms in Comoro Is have been considered to constitute a separate species, on grounds mainly of much smaller size. Original spelling of specific name must be emended, as internal evidence indicates female dedicatee (3). Four subspecies recognized.

Subspecies


SUBSPECIES

Accipiter francesiae francesiae Scientific name definitions

Distribution

Madagascar.

SUBSPECIES

Accipiter francesiae griveaudi Scientific name definitions

Distribution

Ngazidja (Grand Comoro), W Comoro Is.

SUBSPECIES

Accipiter francesiae pusillus Scientific name definitions

Distribution

Ndzuani (Anjouan), C Comoro Is.

SUBSPECIES

Accipiter francesiae brutus Scientific name definitions

Distribution

Maore (Mayotte), E Comoro Is.

Distribution

Editor's Note: Additional distribution information for this taxon can be found in the 'Subspecies' article above. In the future we will develop a range-wide distribution article.

Habitat

All types of primary and secondary forest, and commercial plantations (e.g. Eucalyptus, coffee) (1) and suburban gardens, from sea-level to 1600 m (1). Compared to A. madagascariensis, present species typically occupies lower strata within forest, but is not so constrained in more open habitats, where former species much rarer or absent, and A. madagascariensis generally nests higher and in more open trees (1). On Grand Comoro, race griveaudi occurs mainly on the edge of evergreen forest at up to 1800 m, but will even nest in mangroves elsewhere in Comoros (1).

Movement

None recorded. The distinct races on separate islands of the Comoro Is suggest a sedentary species.

Diet and Foraging

Mainly large insects, such as cicadas, dragonflies, mantises, wasps (1), grasshoppers, locusts (1) or beetles (Carabidae, Scarabaeidae) (1); also spiders (1), and small vertebrates, including frogs, chameleons (PhelsumaLygodactylus) (1), lizards (Mabuya skinks, ZonosaurusTracheloptychus) (1), rodents and small birds up to size of Common Myna (Acridotheres tristis) (1). Lizards appear to be most common prey type (4). In NE Madagascar study, lizards (56%) and birds (23%) made up majority of 305 identified prey items delivered to nest, these supplemented with 16 snakes (8%), 11 terrestrial crabs (5·5%), ten insects (5%), two frogs (1%), two rats (1%) and one bat (0·5%) (5). Studies elsewhere in Madagascar indicate greater proportions of insects, with recently fledged juveniles apparently very (89%) dependent on such items (1). On Mayotte, reptiles (90%) seemingly more important, at least when feeding young, with remaining 10% comprising birds, rodents, amphibians, insects and carrion, with one observation of a bird with a Little Grebe (Tachybaptus ruficollis) (6), and on Grande Comore has been observed raiding (unseen contents of) nest of Comoro Drongo (Dicrurus fuscipennis) (1). Usually hunts from a perch , generally an exposed one, from which it makes a swift dash after quarry, either to tree trunk or foliage, and sometimes perches on riverbank, flying down to attack potential prey (1); pair-members sometimes hunt co-operatively.

Sounds and Vocal Behavior

Very vocal, especially during breeding season (1). Loud, piercing, medium- to high-pitched “kee kee kee” and shrill “kwit kwit kwit” (2), the notes given either singly or repeated at 2–3-second intervals, and considered lower-pitched and less squeaky-sounding than A. madagascariensis (1). Race griveaudi (Grand Comoro) gives short, simple, high-pitched “rick-rickrick-rick-rickrickrick”, each note of c. 0·25 seconds, grouped, and repeated at irregular intervals, or given singly (1). Race pusillus (Anjouan) utters high, grating and squeaky-sounding “criik-criik-criik-criik”, with each note lasting c. 1 second (1). Race brutus (Mayotte) gives long, 5–40-note, sequence of high-pitched, rising and agitated “rick-rick-rick-rick” or “vhit vhit vhit” calls, each note of 0·5 seconds and separated by similar-length interval between them, while begging juvenile utters huskier “whiest whiest whiest” (6); during copulation, female of this race gives “ooi! i! i!” or “oo, oo i! i!” (the “oo” slightly descending), while male produced querulous “werk! ... werk! ...” followed by loud “i-ik! ... i-ik!” calls (1).

Breeding

Laying in Sept–Dec (mainly Oct–Nov) in Madagascar and on Mayotte, but territorial calling and display can commence Aug and nest-building can precede egg-laying by as long as c. 2 months (1). Substantial stick nest, lined with green leaves, built 4·5–7 m up in densely foliaged forest tree, exotic mango (Mangifera indica) near village, or within epiphyte on a plantation tree, whereas on Mayotte nests placed conspicuously 5–28 m (mean 17 m) above ground, mainly in exotic trees (Spathodea campanulata, Erythrina, Mangifera indica) (1). Mean inter-nest distances on latter island unusually small, just 140–159 m (6). May reuse previous season’s nest, despite that this requires extensive restoration work (16 days, versus 26 days to complete brand new structure), or may build new nest relatively close by (250 m distant) (1). Clutch 1–5 eggs, usually 2–3, bluish white (dull white on Mayotte) with lilac and brown markings, mean size 38·5 mm × 31·3 mm, mass 19·2 g (Madagascar) or 34·2–37·3 mm × 29·2–31·2 mm (Mayotte) (1). Following details from study in 1994 and 1995 in NE Madagascar (Masoala Peninsula) (5): nest-building in Oct, laying in Nov and hatching in Dec (dry season), and fledging in Jan (beginning of wet season); of ten pairs, all except one built new nest in 1995; at nests in primary forest, eggs incubated for 79% of observation time by female, 3% by male, and unattended for 18% of time, incubation period 30–32 days, nestling period 25–27 days (males), 27–29 days (females). Of 14 documented breeding attempts in Masoala Peninsula study, 13 successful, total of 33 eggs laid (in 13 nests), average clutch size 2·5 eggs, 29 eggs (88%) hatched, and all hatchlings fledged; average of 2·1 young fledged per breeding attempt, and overall success 93% (5). Pied Crows (Corvus albus) predate nests on Comoros (1), where at first of two study plots on Mayotte, which held 29 pairs in 75 ha, 20 pairs fledged young each, two were still incubating at end of study period and seven failed, while three pairs apparently did not breed; at second study site, with 30 pairs in 61 ha, 19 pairs fledged young, eight failed and again three pairs showed no evidende of breeding (6).

Not globally threatened (Least Concern). CITES II. The commonest of the three members of its genus in Madagascar, but rather uncommon in arid S. Perhaps commonest in NE of island, where 180 pairs estimated on Masoala Peninsula, compared to 25 pairs of A. henstii and 30 pairs of A. madagascariensis (1). In Comoro Is, fairly common in well-wooded areas of Grande Comoro (race griveaudi), but numbers probably only one-tenth of those on Mayotte (see below) (6); once common on Anjouan (pusillus), but by 1960 rare, although not close to extinction as once feared, and now known from scattered sites in C highlands but also close to sea-level, and densities probably similar to those on Grande Comoro (1); and common on Mayotte (brutus), especially at low altitude, at least on moist W side of main island (Grande Terre), where phenonomenally high densities of one pair per 2–2·6 ha achieved and total population estimated at 7225–10,960 pairs (6), but very rare on Petite Terre and just a few observations on offshore islets (1). Not definitely recorded from other islands of Comoros (Mohéli). It has been suggested that the abundance of this species in the Comoros (especially on Mayotte) has affected the colonization possibilities of several passerine birds, given inexplicable anomalies in the archipelago’s avian biogeography, with several species of small birds absent from islands where A. francesiae is present compared to islands where it is not (6). Global population thought likely to include at least 40,000 pairs (2), and appears to be stable. Originally an inhabitant of native forest, this raptor is apparently able to adapt to plantations, as well as large gardens with trees in areas of human habitation, rendering it less vulnerable to degradation and loss of native forest. Occasionally hunted for food on Madagascar (1).

Distribution of the Frances's Sparrowhawk - Range Map
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Distribution of the Frances's Sparrowhawk

Recommended Citation

Kemp, A. C., D. A. Christie, and G. M. Kirwan (2020). Frances's Sparrowhawk (Accipiter francesiae), version 1.0. In Birds of the World (J. del Hoyo, A. Elliott, J. Sargatal, D. A. Christie, and E. de Juana, Editors). Cornell Lab of Ornithology, Ithaca, NY, USA. https://doi.org/10.2173/bow.fragos2.01
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