Numerical Data On African Birds' Behaviour At The Nest.-Ii. Psalidoprocne Holomellena Massaica Neum., The Roughwing Bank-Martin.

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1940
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This Rough-wing is a slender bird with a weight of only about 10 grammes and a weak-looking flight. At Amani it breeds exclusively in holes in the soil, which is a red sandy clay, and either inside, or on the edge of, the forest. Most of the nests at Amani are placed in narrow, approximately horizontal, tunnels at any distance up to two feet in from a vertical soilface, but exceptionally a nest may be built on a ledge of soil under an overhang. The observations of Jackson (1938) on Mt. Elgon suggest that whether the birds use a ledge or a tunnel may be merely a question of opportunity. I have no evidence that they ever do any excavation; van Someren (in litt.) agrees for Kenya, and Jackson's description of ,- a tiny tunnel eighteen inches long made by the birds in a river-bank" maynot be based on critical observation.
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The Ibis, p. 234-248
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