id	author	title	date	pages	extension	mime	words	sentences	flesch	summary	cache	txt
work_yh7innnahrcxxf44pelegdyjby	Denise Dalbosco Dell'Aglio	Estimating the age of Heliconius butterflies from calibrated photographs	2017.0	8	.pdf	application/pdf	3123	322	54	Mating behaviour and predation avoidance in Heliconius involve visual colour signals; whether the hue variation in the forewing dorsal red band of Heliconius melpomene suggesting that red colour can indeed be used as a proxy for age in the study of wildcaught butterflies. Most studies of colouration in Heliconius butterflies have focused on the genetic basis arbitrary age structure in Heliconius using wing condition such as wear, dull colours and colour can be used as a proxy for age in the study butterflies removing human vision bias. colouration and age, a methodology increasingly common in studies of animal coloration Through calibrated digital images, we quantified the redness of Heliconius wings and dorsal red band changes colour with age as had been suggested previously (Fig. 2). Figure 2 Forewing red band changes colour with age. In butterfly wings, age-based colour fading has also been colours in Heliconius for mate choice and mimicry.	./cache/work_yh7innnahrcxxf44pelegdyjby.pdf	./txt/work_yh7innnahrcxxf44pelegdyjby.txt