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L. A. Necker Mém sur les Oiseaux de Genève extrait du 2d. vol des Mém. Soc. Phys. &c de Geneve
p 12.    flock of starlings — Alauda arvensis & arborea & Motacillas pass in March from the south without mingling with the individuals, of same species which are stationary here.
Bears on struggle of Nature  

p 43. in high Alps several arctic & northern birds. —

p. 79 enumerates 57 accidental species & 185 indigenous (migratory & non-migratory) — of accidental birds 20 belong to plains — 16 aux marais— 21 to lake.— (Curious considering this fact & analogous cases in Britain, that distribution of birds so constant — a new comer must find it hard to settle, — capabilities of every country is well experimentised on by new arrivers.—

p. 80 — There are some migratory species, which one sees frequently in their Spring passage, which do not appear on their return. as cranes & crabiers — others one sees only in autumn & not in spring.—

Bears on seeds being transported & yet not growing.

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Necker Birds of Geneva

Saussure L. A. Necker de. 1823. Mémoire sur les oiseaux des environs de Genève. Mémoires de la Société de Physique et d'Histoire Naturelle de Genève 2: 29-122.