Black-capped chickadee - Wikipedia
With Black-capped Chickadees both sexes look alike, tho the males are slightly larger. Passerine, they are non-migratory; on chilly winter nights they can lower their own body temperature to survive, an ability of very few birds. They also build caches of food (mostly seeds), and are able to remember for about a month where the stash is located. Illustr. by Carl Brenders
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Wonderful Wings To Fly
A toutinegra de Blackburnian (Setophaga fusca) é uma pequena toutinegra do Novo Mundo. Elas se reproduzem no leste da América do Norte, do sul do Canadá, para o oeste e para o sul das pradarias canadenses, na região dos Grandes Lagos e Nova Inglaterra, à Carolina do Norte. As toutinegras são migratórias, invernando no sul da América Central e na América do Sul, raramente na Europa Ocidental.