Evaluate the collective function of references cited together in a given text segment.
Classify their combined role into one of the following categories: 'method', 'background', or 'result'.

Text:This behavior has been observed in Calliphoridae under conditions of captivity (Dale and Prudot 1987) and in nature, where females lay eggs in the natural openings of cadavers or in wounds such that newly emerged larvae can quickly find a substrate for food (Byrd and Castner 2010). It is also observed that females eat meat after each oviposition; this behavior has been observed in many species of Diptera with anautogenous females, who need protein feed for the development of their ovarian follicles (Chapman 1975). The average number of ovipositions registered in this study was 3.65 ¬± 2.14, with a maximum of 9 batches/ female and 199 ¬± 45 (min 76, max 302) eggs/batch (n = 127), and a female required 16.6 ¬± 1.84 min for each oviposition event (n = 10). Dale and Prudot (1987) found similar results for C.
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