Sentence examples for birds were presented with from inspiring English sources

They learned that A was always better than B, and C was always better than D. The confusion arose when the birds were presented with keys B and C together.

They spied on the females from behind a blind a few meters away as the birds were presented with multiple bachelors, some with big masks, some with bright yellow throats.

Once birds consistently used the tool to retrieve food (8/10 on two consecutive blocks of 10 trials), the experienced birds were presented with tool-tubes containing training tools of four lengths (see above) within beak-reach, and a food-tube with food at different depths, out of beak-reach (food could be retrieved by 1 4 of the training tools, depending on food position).

In the first eight trials the birds were presented with a single starting stimulus.

Birds were presented with 16 choices per day, and we recorded the number of choices of each type of prey.

Birds were presented with a choice between two models, one with two circular spots (diameter = 9 mm) and another with eyespots approximately half the area of the previous (diameter = 6.36 mm).

At the age of 20 to 23 days, each bird was presented with odor samples from the nest it hatched in and the nest that served as its foster home.

Each bird was presented with the toxic prey while living on a high-quality diet and a low-quality diet.

In each trial a bird was presented with a choice between two paper models glued onto a beige cardboard of dimensions 250 × 100 mm with a distance of 190 mm between the centres of the butterfly models (Additional file 2: Figure S1 ii).

On each day, birds were presented sequentially with 16 prey on appropriately coloured backgrounds.

Birds were presented in blocks.