233 Ravens remember the nature of a single reciprocal interaction sequence over 2 days and even after a month.

232 Sea spider pumps blood with its guts.

231 Family-transmitted stress in a wild bird.

230 Avian egg shape: Form, function, and evolution.

229 Drivers of salamander extirpation mediated by Batrachochytrium salamandrivorans.

228 Seed dispersal kernel of the largest surviving megaherbivore—the African savanna elephant.

227 Overseas seed dispersal by migratory birds.

226 Naturally occurring fluorescence in frogs.

225 Tardigrades (Water bear) Use Intrinsically Disordered Proteins to Survive Desiccation.

224 Why is the giant panda black and white?

223 Farming and public goods production in Caenorhabditis elegans populations.

222 Predicting human olfactory perception from chemical features of odor molecules.

221 Mega-evolutionary dynamics of the adaptive radiation of birds.

220 Zebra finches fostered by Bengalese finch parents learn Bengalese finch songs but with zebra finch timing.

219 Sibling conflict and dishonest signaling in birds.

218 Social status alters immune regulation and response to infection in macaques.

217 A Mighty Claw: Pinching Force of the Coconut Crab, the Largest Terrestrial Crustacean.

216 Sexual display complexity varies non-linearly with age and predicts breeding status in greater flamingos.

215 Radiocarbon dating of seized ivory confirms rapid decline in African elephant populations and provides insight into illegal trade.

214 Annual 10-Month Aerial Life Phase in the Common Swift Apus apus.

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