Definition
In old English law, an eyry or nest — specifically, the nest of a bird of prey such as a hawk, sparrow-hawk, falcon, eagle, or heron. The term appears in forest law and related charters to denote the roosting and nesting sites of raptors kept or found within royal forests and hunting preserves. Because birds of prey held significant economic and social value in medieval England — falconry being both a practical and aristocratic pursuit — the location and ownership of their nesting sites was a matter of legal consequence, subject to royal regulation and forest custom.
Common Language
Modern common usage (Wiktionary): No standard entry. The term does not appear in modern general English.
Historical common usage (Webster's 1913): Not entered as a standalone term. Webster's recognizes "aerie" (also spelled "eyrie" or "eyry") as the nest of an eagle or other bird of prey, situated in a high or inaccessible place.
The legal term aerea is the Latinized form used in medieval English legal instruments and forest charters. It carries the same core meaning as the common English "aerie" but functions as a term of art within the specialized regime of forest law, where rights over nesting sites were legally defined, enforceable, and subject to crown oversight. A researcher encountering aerea in a legal record should not treat it as mere descriptive language — it signals a regulated property interest.
Why It Matters in Research
Aerea is a narrow term of forest law and will appear almost exclusively in medieval English sources: royal forest charters, eyre rolls, and treatises on forest administration such as Fleta. The Carta de Foresta (Forest Charter, 1217) and its subsequent reissues are the primary documentary context; chapter 13 of that charter addresses eyries directly. Researchers working in pre-modern English legal records should recognize that references to aereas accipitrum, espervariorum, falconum, aquilarum, or de heyrinis are not incidental natural descriptions but references to property and jurisdictional claims.
The term will not appear in modern legal sources. Its relevance is purely historical and is confined to the corpus of English forest law, manor records, and related medieval Latin legal texts. Researchers using Burrill should note that his gloss draws on Kelham's dictionary of Norman French as well as Fleta — both useful companion sources when tracing this term through the original documents.
One research trap: the variant spellings are numerous. Medieval scribes rendered the term inconsistently — aeria, eyra, ayra, and aire all appear in period sources alongside aerea. A corpus search limited to the Latinized form alone will miss a significant portion of relevant records.
Historical Dictionary Support
Burrill's Law Dictionary provides the primary entry and is the most developed source available. Burrill correctly identifies the Saxon and Anglo-Norman roots (Sax. eghe; Anglo-Norm. eye), links the term to the Forest Charter (Carta de Foresta, c. 13), and cross-references Fleta (lib. 2, c. 41, § 7) and Kelham. No substantial divergence exists among historical law dictionaries on this term because the term is narrow and its meaning was not contested. The limitation of the available sources is scope, not accuracy: Burrill gives a definition adequate for identification but does not develop the legal consequences of owning or encroaching upon an aerea — for that, researchers must go directly to the forest law treatises themselves.
Jurisdictional Note
Aerea is a term of English forest law with no recognized equivalent in Scots law, civilian legal systems, or American law. It has no living jurisdictional application.